The machine clamps is the accessories of the machine-mounted turning tool. Machine-mounted turning tools fix the blade on the tool shaft by means of mechanical clamping. These tools allow the blade to be replaced with a new one that has been ground and sharpened after becoming blunt.
Machine-mounted turning tools, also known as interchangeable turning tools, are cutting tools that fix pre-ground blade pieces on the tool holder through mechanical clamping. Their most significant feature is that when the blade wears out, new ground blades can be quickly replaced, avoiding the problem of blade performance degradation caused by high-temperature welding in welded turning tools. As of March 2025, these turning tools are classified into four types based on the blade clamping method: lever type, wedge block type, screw type, and upper pressure type. As of November 2024, their commonly used clamping structures also include eccentric type, pin type, wedge block type, lever type, and upper pressure type. According to the principle of clamping force, their clamping methods can be classified as top surface clamping (C), cylindrical hole clamping (P), top surface and cylindrical hole clamping (M), and blind hole clamping (S), etc.
Machine-mounted replaceable insert cutting tools are formed by mechanically clamping replaceable carbide inserts onto the tool body. They generally consist of inserts, tool holders, clamping elements, and tool bodies. Regardless of the clamping method used, the inserts must meet the following conditions when clamped:
- The positioning of the inserts must conform to the principle of positioning by cutting force, that is, the resultant force of the cutting force must act within the perimeter of the support surface of the insert;
- The positioning of the peripheral dimensions of the inserts must satisfy the three-point positioning principle;
- The friction force generated by the resultant force of the cutting force and the clamping force on the positioning base (the interface between the insert and the tool body) must be greater than the alternating force that causes the insert to detach from the positioning base due to cutting vibration.
The eccentric clamping structure uses an eccentric shaft at the upper end of the screw to clamp the insert onto the tool body. This structure relies on eccentric clamping and self-locking of the screw, is simple in structure, and convenient to operate, but cannot achieve bilateral positioning. When the eccentricity is too small, high manufacturing accuracy of the insert is required. If the eccentricity is too large, the insert is prone to loosen under the impact of the cutting force. Therefore, the eccentric clamping structure is suitable for continuous and stable cutting situations. The lever clamping structure uses the lever principle to clamp the insert. When the screw is rotated, the lever generates clamping force, thereby positioning the insert on the side surface of the tool groove. This structure is characterized by high positioning accuracy, reliable clamping, reasonable force distribution, and convenient application, but has poor processability. In the wedge block clamping structure, the inner hole of the insert is positioned on the pin in the insert groove, and the wedge block with a sloping surface is pressed down by the tightening screw. One side of the wedge block presses against the protrusion on the tool body, while the other side pushes the insert towards the cylindrical pin in the middle hole to clamp the insert. The characteristics of this structure are simple and convenient operation, but the positioning accuracy is low, and the clamping force is opposite to the cutting force.
The angle of the replaceable cutting tool is formed by the combination of the angle of the insert and the angle of the bottom surface of the insert groove on the tool body. The design principle for precision machining machine-mounted replaceable cutting tools is to enhance the sharpness of the tool and achieve the desired surface quality. The design principle for semi-precision machining machine-mounted replaceable cutting tools is to enhance the strength of the tool. For precision machining machine-mounted replaceable cutting tools, the rake angle of the insert g = 20°, the secondary rake angle a = 8°~9°, the auxiliary rake angle a = 6°~8°, the main included angle Kr = 90°, the secondary included angle Kr = 5°, and the edge inclination angle l = 0°~1°. For semi-precision machining machine-mounted replaceable cutting tools, the rake angle of the insert g = 20°, the secondary angle a = 6°~7°, the main included angle Kr has three values of 90°, 45°, and 80°, and the secondary included angle Kr has two values of 10° and 45°.
Replaceable cutting tools are directly formed by pressing during the production of the inserts. For the upper-pressing replaceable cutting tools, when the chip-breaking groove is formed using a press plate, the bottom angle of the groove is set to θ = 125°~ 135°.
Advantages
The blades are not welded at high temperatures, which can prevent the decline in blade hardness and the occurrence of cracks caused by high-temperature welding. Thus, it extends the tool's lifespan and the tool handle can be reused multiple times.
Structural forms
1. Top-pressing type
This type uses screws and pressure plates to press the blade from the top, and the position of the blade can be adjusted by adjusting the screws.
Features: Simple structure, reliable clamping, convenient to use, the blade is installed horizontally, and the rear can be re-ground after being dulled.
Top-pressing type is the most commonly used in processing.
2. Side-pressing type
This form usually makes use of the inclined surface of the blade itself. The wedge block and screws are used to clamp the blade from the side of the blade.
Features: The blade is installed vertically. The requirements for the manufacturing accuracy of the tool groove can be appropriately reduced. The rear can be re-ground after the blade is dulled.
3. Cutting force clamping type
This type usually refers to the self-locking cutting tool. It uses the cutting force during the cutting process of the tool to clamp the blade in a 1:30 inclined groove.
Features: Simple structure, convenient to use. However, it requires a close fit between the tool groove and the blade, and there is no impact or vibration during cutting.
SPEC
|
Material |
Solid tungsten carbide |
|
Surface |
Polished |
|
Chemical Composition |
10% Co & 90% WC |
|
Grain Size |
1.2 μm |
|
Hardness (HRA) |
≥90 |
|
Magnetic Force |
23 (KA/M) |
|
T.R.S |
3200 (N/mm2) |
|
Magnetic Saturation |
10.3 (Ms) |
|
Purpose |
Kind of tools |
|
Density |
14.05 (g/cm3) |
Tungsten Cemented Carbide Grade
Main
Hot Products
Company Information
Kunshan Zhiyi Dingli Cemented Carbide Tool Co., Ltd. locates the famous domestic tool and machinery equipment production base - Suzhou. The factory is mainly working on the production and development of all kinds of carbide tools, like end mill, tap, drill bits, carbide pilots. In China, our goal is to become the central base of manufacture of die-casting rods, carbide boring bar, standard cutters, non standard cutters and hard-machining cutters, establishing a good and healthy company image among coterie.
At present,the company can. In general, our products can be used in manufacture of mould, electronics, car engine and accessories, petroleum machinery, machinofacture, etc. We have stable customers, such as the United States, Russia, Indonesia, South Korea, Japan, Australia and so on.
Testing Machine
Production Flow Chart
Packing & Delivery
Packing
1>Put the goods encased with plastic bag or plastic case in wooden box/carton/iron box, etc.
2>Other packing will be accept according to your needs.
FAQ
Q1: How long is your delivery period?
A1: It depends on specific conditions. However, it could be 10 to 15 days on average.
Q2: Do you offer samples?
A2: Yes, we do offer samples. However, buyers need to pay for the freight charge. In addition, whether samples are free or not depends on the quantity you buy.
Q3: How do you pack the products?
A3: In general, we use wood, plastic or carton boxes. We also put some soft materials inside to prevent possible damage on products.
Q4: How much advance payment do I need to make?
A4: If the products you buy are in stock, you need to make full payment; if the products are out of stock, you need to make about 50 percent of full payment and then we will start the production process. However, you still need to pay the rest of charges before we deliver the products.
Q5: What kinds of payment do you accept?
A5: In addition to the patterns of payment shown above, you can discuss with us about in which way you would like to pay.
About Color Aberration
Product pictures are all physical photography, due to photo-taking technology, light, display parameters, etc., there may be differences between the received physical objects and photos, please refer to the physical.
Cargo Receipt
All our products go through strict inspection and count before shipment. Please check the goods in person when they receive them.
Please refuse to sign and contact us if you find that the CTN number and model is wrong or the product is damaged in transit.
Hot Tags: machine clamps, China machine clamps manufacturers, suppliers, factory
