High Speed Cnc Milling Machine

Dongguan JIDE Precision Machinery Co., Ltd. was found in the renowned city - Dongguan the biggest mold production center is famous for manufacturing.

Integrating with design, development and production, we specializes in producing and selling CNC machine tool with more then 15 years experience .
We adhere to the principle of building a stable stable relationship with customer based on the honesty and try our best to establish a world-famous brand.

Strict quality control

The parallelism and flatness of the High speed cnc milling machine  linear rails are required to be within 0.01mm

Laser laser detection and calibration compensation,

The roundness of the ballbar is required to be 300mm, within 0.012mm

Spindle deflection is required to be 300mm, within 0.003mm

Spindle coupling concentricity requirements, within 0.005mm

6 reasons for choice us high precision milling machine 

Independent research and development cost-effective

Strong technology

lSO, environmental certification

imported parts

Free maintenance service

24H after-sales service

Excellent R & D team

Machine parameter 

High speed cnc milling machine detail display

Thick body, detailed casting, good quality, high-speed quick tool change, 16T/21T clamp arm servo tool magazine, high-speed tool change structure design, pre-sensing control and efficient tooling

Taiwan C3 ball screw

As the core component of the machine tool, Taiwan C3 ball screw provides better working quality

Super Spindle

BT40 spindle motor direct transmission, high-power spindle, strong power

Application field, master the core technology and lead the development of science and technology

Mould manufacturing

Automobile industry

aerospace industry

Consumer Electronics Industry

Education industry

5G smart

Why is the first workpiece inspection produced by your high precision milling machine always ineffective?

In the design and production process of any product, activities such as design changes, process changes, process adjustments, unplanned line stoppages, production changes, and line changes often occur.

How to ensure that these activities will not affect the quality of subsequent production? This requires the first article inspection in the stages of operation preparation verification and post-production verification!

The first article inspection is a necessary method in on-site quality control. It generally refers to: the beginning of each shift or changes in the process (such as personnel changes, refueling and tooling changes, machine tool adjustments, tooling tool replacement and grinding, etc.) ) Inspection of the first or first few products after post-processing. Generally, 3-5 pieces of products in continuous production need to be inspected, and subsequent products can be processed in batches after passing.

Most of the production of parts in the automotive industry adopts this kind of control method, but does the first article inspection we do play a role in quality control?

First article inspection failure case:

A factory repeatedly found that the left front window control switch was not sensitive to the lifting glass. After investigation, the height of the sliding block produced by the factory exceeded the lower limit. The product data of the 8 molds in the piece inspection are: 9.78, 9.80, 9.77, 9.80, 9.77, 9.79, 9.77, 9.79, and the production starts after the first piece passes the inspection. Why are there still defective products?

Let's take a look at how to do the first article inspection?

Definition of first article and first article inspection

Process changes:

During the production process, any one or more of the production elements in 5M1E (people, machine, material, method, environment, and test) changes, such as personnel changes, equipment adjustment and maintenance, material and fixture changes, design changes, Stop the line and so on.

first item:

The first product or products processed by the production line at the beginning of each shift/line production input or after a process change. For high-volume production, "first article" often refers to a certain number of samples.

First Article Inspection:

An inspection performed on the first or first few units processed on a production line at the beginning of each shift or after a process change. The number of inspections can be formulated according to the requirements of different enterprises or customers.

Generally speaking, at least 3-5 products in continuous production need to be inspected, and subsequent products can be processed only after passing the test. First article inspection is rigorously performed before any changes to equipment or manufacturing processes, and before each work shift begins processing.

2

Purpose of first article inspection

The first article inspection in the production process is mainly to prevent batches of products from being out of tolerance, repaired and scrapped. It is a means of pre-controlling the production process of products, an important method of product process quality control, and an enterprise to ensure product quality. An effective and indispensable method to improve economic efficiency.

The first article inspection is to find out the factors affecting product quality in the production process as early as possible, and prevent batch failure or scrap.

The official production can only be started after the first piece of inspection is passed, mainly to prevent the occurrence of unqualified products in batches.

Long-term practical experience has proved that the first inspection system is an effective measure to find problems as early as possible and prevent products from being scrapped in batches. Through the first article inspection, it can be found that there are systematic reasons such as severe wear of fixtures or installation and positioning errors, poor accuracy of measuring instruments, misreading drawings, wrong feeding or formulas, etc., so that corrective or improvement measures can be taken to prevent batch failure. Goods happen.

Timing/occasion for first article inspection

1) Each work class starts with

2) Change the operator

3) Replacement or adjustment of equipment and process equipment (including tool replacement or sharpening)

4) Changes in technical conditions, process methods and process parameters (such as changes in roughness requirements, changes in inner hole reaming to boring, changes in tool feed or speed in NC programs, etc.)

5) After adopting new materials or material substitutions (such as material changes during processing, etc.)

6) Replace or retest the bath solution, etc. (such as phosphating, nitriding, etc.)

First Article Inspection Requirements

The first article inspection adopts a three-inspection system: self-inspection, mutual inspection and special inspection.

The products submitted for inspection must first be "self-inspected" by the operator, then "mutually inspected" by the team leader or colleagues, and finally "specially inspected" by the inspector, and the subsequent products can only be processed after confirming that they are qualified.

Whether the first piece is qualified after the inspection shall be finally approved by the full-time inspector. The inspector shall mark the first product that passes the inspection and keep it until the class or a batch of products are processed (all first products must be Reserve samples for subsequent product comparison to see if the process has changed, and mark "√" with a marker pen to indicate passing the first article inspection).

If the first piece fails to pass the inspection, it is necessary to find out the reason, take measures, and re-process after troubleshooting, and carry out three inspections. It can only be determined as the first piece after passing the inspection.

What is the record of first article inspection?

First the mass characteristic values of the first piece are recorded.

The second is the most important, record the operating conditions of the first piece of processing, including but not limited to the raw material manufacturer's batch, the actual value of the process parameters (not the set value), environmental parameters, the model of the mold tool, etc.

If it is a CNC equipment, the processing time can also be recorded, as long as it can be traced back to the conditions of the first piece of processing.

The above records correspond to the factors affecting the quality of the first piece and the first piece of processing. If a defect is found in mass production, the first piece can be compared with the operating conditions of the first piece on the spot to find the cause of the defect.

There may be an embarrassing situation, that is, there are defective products, but the operating conditions of the defective products are not much different from those of the first one.

Congratulations, you have discovered a new factor affecting quality, find a way to identify and control it.

First article inspection specification process

1) Subject content and scope of application

This document stipulates the company's requirements and work procedures for the first article inspection and batch first article inspection of new products during the production process.

This provision applies to the company's control over the first article inspection and batch first article inspection of new products during the production process.

2) Responsibilities

The production department is responsible for organizing and arranging the first article inspection.

The person directly responsible shall be responsible for the quality accidents caused by the unauthorized production of products without the first piece of new product, the first piece of batch inspection or the failure of the first piece of inspection.

The inspector and the person in charge of the production line are responsible for the correctness of the first article inspection.

If the confirmation work of the first piece is not completed, the inspector begins to issue the quality certificate, and the quality accident caused by it shall be the responsibility of the inspector.

3) Control requirements

The first completed semi-finished product and finished product that are continuously produced by the production department for the first time must go through the first article inspection and confirmation.

For regular production products, first article inspection shall be carried out by batch.

Due to the shutdown caused by equipment, process, etc., the first article inspection and confirmation shall be carried out when the shutdown is restarted.

The first article inspection and confirmation shall be carried out when the product materials and specifications are changed and put into production.

When inspecting the first piece of a new product, the production unit shall be responsible for notifying the relevant personnel of the inspection, and conduct it according to the currently valid drawings, checklists (or samples provided by the customer), and process documents. Sign and hang the card on the first product to mark the first product; if the first product fails to pass the inspection, it should be returned immediately, the first product should be redone, and a record should be made. Products that have not passed the first article inspection shall not be accepted.

The first piece is a sample for mass production, and the production department is responsible for keeping it until the end of the batch production before delivering it.

In the first article inspection, all raw and auxiliary materials used in the production process of the product should be checked, and must comply with the regulations.

4) Working procedure

During the production process of the first piece, the person in charge of the production line and the inspection personnel should go to the production site to supervise and inspect the actual producer to complete the first piece by himself according to the production process flow and the current effective production process documents, and supervise and inspect each production process. Issues were corrected and resolved in a timely manner.

The production of the first piece of conventional production products and products produced after shutdown and restarting must complete all production processes, and after the manufacturer passes the inspection and signs on the first piece plate, it will be handed over to the inspector for first piece inspection. During the inspection of the first article, the inspector shall, together with the person in charge of the production line, conduct the inspection according to the currently valid drawings, lists (or samples provided by the customer), process documents, and product requirements, and mark the first article after passing the inspection (such as endorsement " The first article is qualified, etc.), and the first article card shall be countersigned by the producer (or representative) and the inspector. For the first piece inspection required due to major changes in the product, it can be approved by the relevant personnel and the inspection signature; if the first piece inspection fails, it will be returned immediately and the first piece will be redone.

The first mass production of new products and semi-finished products and finished products produced after changes in materials and specifications need to undergo first article inspection and confirmation.

During the first article inspection, the first article record shall be made in time, and the first article confirmation form shall be filled out.

When the quality problem is found in the production of the first piece, it should be reported and dealt with in time, and the unqualified items should be re-confirmed. Production can only be organized after the qualified first piece is inspected and the result is recorded on the first piece card, and the quality is approved by the inspector.

Only after the first piece is confirmed, the inspector can start the normal delivery inspection.

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