Shenzhen Honsc Precision is a professional manufacturer of screw, standoff,nut and others fasteners. We offer OEM and ODM service with any related products for customers. We have a professional team of product internal structure design and engineers, as well as a professional packaging team, our sales and documentation and logistics departments can finish the requirements of presentation of documents under various payment methods and different transportation modes.

• We will provide samples with regular colors, regular functions, no brand printing and PE bag packaging to confirm the styles and basic parameters for customers

• After receiving the regular samples, customers will arrange the size and magnetic test, After confirming that the size are approval, we will arrange second sampling when the customer needs us to improve the product function magnetic. The following are the details required by the customer and we provide redesign to meet requirment. 

Meantime, we will test it before shipping samples. And all tests are strictly carried out according to industry standards.

• After receiving T2 samples (designated special size and magnetic adjustment, etc.), customer arrange tests again. If confirmed the sample okay, the customer needs us to provide the certificates of this product conforming to EU standards, such as RoHS and MSDS before placing order. And the list of CE compliance statements as follows. All of our products are in accordance with all the European certification, such as CE, RoHS, REACH, etc., and all of them have prepared standard documents for customers checking.

• We start to prepare the order materials when customer confirm all the details such as color, size, function and other details of the final sample.

After the package such as qty, card, shipping mark etc. are provided by customer, we starts to arrange the master production. After all the goods finished, send picture to customer for approval. We promise the packaging is same as customer requested, master products are exactly the same as the final samples. The following photos of the master shipment, the passing rate of the third-party inspection of our company is 100%.

• After receiving shipment of whole order, customer put it on the market immediately and became the most popular product in the market quickly, no matter from the traditional market, the market of high-end professional fasteners or the online sales in Amazon. We always pay much attention to the quality of our products, which is recognized by customers and repurchased constantly.

With the arrival of the world's fourth industrial revolution, and the continuous development of science and technology and social production, mechanical manufacturing technology has undergone profound changes, the structure of mechanical products is more and more reasonable, and its performance, accuracy and efficiency are increasingly improved, so the production equipment of processing mechanical products has put forward high performance, high precision and high automation requirements. In order to solve the problem that ordinary machine tools can not be produced, to achieve single and small batch production, especially the automatic processing of some complex parts, CNC machining came into being.

Although, at present, China has become a processing country, precision parts processing plants all over the country. According to the data of the General Administration of Customs of China, in January and February 2023, the cumulative export volume of China's machine tools reached 2364123 units (2,364,100 units), from high-end CNC customized precision parts to ordinary standard products can achieve standardized mass production, the application of CNC technology can realize the automatic processing of parts and improve production efficiency. Especially in the automotive manufacturing, aerospace, electronic equipment manufacturing and other fields, the application of CNC technology has great potential. The application of CNC technology can realize the automatic processing of parts and improve production efficiency. Especially in the automotive manufacturing, electronic equipment manufacturing and other fields, the application of CNC technology has great potential.

CNC machining is widely used in the field of automotive parts, involving the engine, transmission, chassis, braking system, steering system and other aspects. However, no matter in any field of precision machining, achieving high precision and high speed is an important competitive means to obtain user orders.

The following are some specific applications of CNC machining in the field of automotive parts: 

Engine parts machining: CNC machining can be used to manufacture various parts of the engine such as cylinder block, crankshaft, connecting rod, valve seat, etc., which require high precision and high strength. 

1.Transmission parts processing: CNC machining can be used to manufacture various parts of the transmission system such as transmission gears, clutches, transmission shafts, etc., which require high precision and high strength. 

2.Brake parts processing: CNC machining can be used to manufacture various parts of the brake system such as brake discs, brake pads, brakes, etc., which require high precision and high quality.

3.Steering parts processing: CNC machining can be used to manufacture various parts of the steering system such as steering gear, steering rod, steering machine, etc., these parts need high precision and high strength.

With the continuous development of CNC machining technology and the expansion of application fields, whether it is automobile body design or automobile internal electronic parts processing, the application range of CNC custom machining technology in the field of automation will be more and more extensive. In the future, CNC machining technology will continue to play an important role in the automotive manufacturing field.

CNC machining process common problem points and improvement methods

Starting from the actual production, this paper summarizes the common problems and improvement ways of CNC machining process, and how to choose the three important factors of speed, feed rate and cutting depth in different application fields

The workpiece is over-cut

The reason:

1. Knife, tool strength is not enough too long or too small, resulting in knife.
2. Improper operation by the operator.
3. Uneven cutting allowance (such as: 0.5 on the side of the surface, 0.15 on the bottom)
4. Improper cutting parameters (such as: tolerance is too large, SF setting too fast, etc.)

Improvements:

1. The principle of using a knife: can be big or small, can be short or not long.
2. Add the clearing procedure, and the margin is as even as possible (the margin on the side and the bottom is the same).
3. Reasonable adjustment of cutting parameters, large margin corner round.
4. With the SF function of the machine, the operator fine-tunes the speed to achieve the best cutting effect.

The central question

The reason:

1. Operator manual operation is not accurate.
2. There are burrs around the mold.
3. The center bar has magnetic field.
4. The four sides of the mold are not vertical.

Improvements:

1. Manual operation should be carefully checked repeatedly, and the points should be at the same point and height as far as possible.
2. Remove burrs with a whetstone or file around the mold, wipe clean with a rag, and finally confirm with your hand.
3. Demagnetize the dividing rod before dividing the mold (ceramic dividing rod or other).
4. Check whether the four sides of the mold are vertical (if the verticality error is large, it is necessary to review the plan with the fitter).

The knife problem

The reason:

1. Operator manual operation is not accurate.
2. Tool clamping error.
3. The blade on the knife is wrong (the knife itself has a certain error).
4. There is an error between R knife and flat knife and flying knife.

Improvements:

1. Manual operation should be carefully checked repeatedly, and the knife should be at the same point as possible.
2. Blow clean with air gun or wipe clean with rag when clamping the tool.
3. One blade can be used when the blade on the flying knife is to measure the rod and light the bottom surface.
4. A separate knife program can avoid the error between R knife flat knife flying knife.

The crash - programming

The reason:

1. The safety height is not enough or not set (the knife or chuck hits the workpiece when the fast feed G00).
2. The tool on the program list and the actual program tool are written wrong.
3. The tool length (blade length) and the actual machining depth on the program list are wrong.
4. The depth Z-axis fetch number and the actual Z-axis fetch number on the program are written incorrectly.
5. The coordinates are set incorrectly during programming.

Improvements:

1. Accurate measurement of the height of the workpiece also ensures that the safety height is above the workpiece.
2. The tool on the program list should be consistent with the actual program tool (try to use the automatic program list or use the picture program list).
3. Measure the actual depth of machining on the workpiece, write the length of the tool and the length of the blade on the program sheet (generally, the tool clip length is 2-3MM higher than the workpiece, and the blade length avoidance is 0.5-1.0MM).
4. Take the actual Z-axis number on the workpiece and write it clearly on the program sheet. (This operation is generally written manually to check repeatedly).

Crash machine - Operator

The reason:

1. Depth Z-axis alignment error ·
2. The number of touch and operation errors (such as: unilateral access without feed radius, etc.).
3. Use the wrong knife (such as: D4 knife with D10 knife to process).
4. The program goes wrong (for example: A7.NC goes A9.NC).
5. The hand wheel is rotated in the wrong direction during manual operation.
6. Press the wrong direction (for example, -X +X) during manual fast feed.

Improvements:

1. Depth Z-axis knife must pay attention to the position of the knife. (bottom, top, analysis, etc.).
2. Check the number of touch and operation repeatedly after completion.
3. When installing the tool, it should be installed after repeated check with the program list and the program.
4. The program should go one by one in order.
5. In the manual operation, the operator should strengthen the operation proficiency of the machine tool.
6. In the manual fast movement, you can first raise the Z axis to the workpiece above the move.

Surface accuracy

The reason:

1. The cutting parameters are unreasonable and the workpiece surface is rough.
2. The edge of the tool is not sharp.
3. The tool clamping is too long, and the blade is too long.
4. Chip removal, air blowing, oil flushing is not good.
5. Programming cutting mode, (you can try to consider going down milling).
6. The workpiece has burrs.

Improvements:

1. Cutting parameters, tolerances, allowance, speed feed Settings should be reasonable.
2. The tool requires the operator to check and replace it periodically.
3. When installing the tool, the operator is required to clip as short as possible, and the blade should not be too long.
4. For the lower cut of flat knife, R knife and round nose knife, the speed feed setting should be reasonable.
5. The workpiece has burrs: the root of our machine tools, tools, and cutting methods are directly related. Therefore, we need to understand the performance of the machine tool and repair the edge with burrs.

The blade is broken

Reasons and improvements:

1. Feed too fast

-- Slow down to a suitable feed speed

2. Feed too fast at the beginning of cutting

-- Slow down the feed rate at the beginning of cutting

3. Clamp loosely (knife)

-- Clamp

4. Clamping loose (workpiece)

-- Clamp

5. Insufficient rigidity (tool)

-- Use the shortest knife allowed, a little deeper in the grip, and try downmilling

6. The cutting edge of the tool is too sharp

- Change the fragile cutting edge Angle, one edge

7. Insufficient rigidity of machine tools and tool handles

-- Use a rigid machine tool and a tool handle

Wear and Tear

Reasons and improvements:

1. Machine speed is too fast

- Slow down and add enough coolant

2. Harden the material

-- Use advanced tools and tool materials to increase surface treatment

3. Chip adhesion

- Change the feed speed, chip size or clean the chip with cooling oil or air gun

4. Improper feed speed (too low)

-- Increase feed speed and try downmilling

5. The cutting Angle is not suitable

- Change to the appropriate cutting Angle

6. The first back corner of the knife is too small

-- Change to a larger back Angle

Destruction

Reasons and improvements:

1. Feed too fast

-- Slow down the feed rate

2. The cutting amount is too large

-- Use smaller cutting amounts per edge

3. Blade length and full length are too large

- Deep grip, with a short knife, try to mill down

4. Too much wear and tear

-- Regrind at an early stage

Vibration marks

Reasons and improvements:

1. Feed and cutting speed is too fast

- Correct feed and cutting speed

2. Insufficient rigidity (machine tools and tool handles)

- Use better machine tools and tool handles or change the cutting conditions

3. The rear Angle is too large

- Change to a smaller back Angle, machining the edge belt (oil stone grinding once)

4. Clamp loosely

-- Clamp the workpiece

◆ Consider speed, feed

The relationship between the three factors of speed, feed and cutting depth is the most important factor to determine the cutting effect, inappropriate feed and speed often lead to reduced production, poor workpiece quality, tool damage.

Use the low speed range for:

• High hardness material
• Headstrong big material
• Hard to cut material
• Heavy cut
• Minimal tool wear
• Maximum tool life

Use the high speed range for:

• Soft material
• Good surface quality
• Smaller tool diameter
• Light cut
• Large brittle workpiece
• Manual operation
• Maximum processing efficiency
• Non-metallic material

Use high feeds for:

• Heavy, rough cutting
• Rigid construction
• Machinable material
• Roughing tool
• Surface cutting
• Low tensile strength material
• Coarse tooth milling cutter

Use a low feed for:

• Light machining, fine cutting
• Brittle structure
• Difficult material
• Small cutter
• Deep vertical groove machining
• High tensile strength material
• Finishing tool

Honscn has more than ten years of cnc machining experience, specializing in cnc machining, hardware mechanical parts processing, automation equipment parts processing. Robot parts processing, UAV parts processing, bicycle parts processing, medical parts processing, etc. It is one of the high-quality suppliers of cnc machining. At present, the company has more than 20 sets of cnc machining centers, grinding machines, milling machines, high-quality high-precision testing equipment, to provide customers with precision and high-quality cnc spare parts processing services.Contact us