CN104959665B - A kind of combined high flexibility knife bar - Google Patents

Abstract

A kind of combined high flexibility knife bar, it mainly solves the flexible low technical problem that pyrocondensation knife bar manufacturing cost is high in existing handle of a knife pyrocondensation knife bar cutter formula tooling system, and technical difficulty coordinates greatly and with milling cutter.Its drip irrigation device is：It includes steel knife bar（1）, heat expansion folder cylinder（2）, milling cutter（3）, steel knife bar（1）Inside is stair-stepping hollow structure, and one end is the short taper profile structure coordinated with handle of a knife (4), and the other end is the long pyramidal structure being engaged with heat expansion folder cylinder (2), and heat expansion presss from both sides cylinder（2）Inside is through-hole structure, milling cutter（3）It is fitted into by thermal shrink fit in the through hole that heat expansion presss from both sides cylinder (2).Simple to install of the present invention, easily split, size is easily expanded, interchangeability is good, and manufacturing cost is low, improves its applicability as processing unit (plant) well.It is mainly used for accurate, high-rate wireless LAN field.

Description

A combinable and highly flexible tool holder

technical field

The patent of the present invention relates to the research field of high-speed milling finishing, in particular to a combinable and highly flexible tool holder for milling equipment.

Background technique

With the wide application of high-speed milling technology and the development of precision machining technology, the requirements for high-performance CNC milling machine tool systems are getting higher and higher. Therefore, many machine tools have begun to adopt the tool holder-heat-shrinkable tool holder-tool tool system structure , the tool holder-heat-shrinkable tool holder-tool tool system has simple structure, large clamping force, large cutting torque, high radial positioning accuracy, high radial rigidity, strong shock absorption ability, and can also be used for deep cavities However, the strict dimensional tolerance requirements of heat-shrinkable tool holders lead to high manufacturing costs, complex manufacturing processes, and strict requirements on materials, and heat-shrinkable tool holders can only clamp tools with the same diameter. For small-diameter tools with a diameter of 1-3mm, the manufacturing disadvantages of heat-shrinkable tool holders are more obvious. Therefore, a new method is needed to solve the above technical problems.

Contents of the invention

The purpose of the present invention is to provide a combinable and highly flexible tool holder, by installing thermal expansion chucks with different inner hole diameters with high expansion coefficients between the heat-shrinkable tool holder or steel cutter holder and the tool, so that different diameters The milling tool is clamped with high strength, which improves the flexible exchange of the milling tool at the front end of the heat-shrinkable tool holder. This device does not change the structure of the tool system itself, so it has strong applicability.

The technical solution adopted by the present invention to solve its technical problems is: it includes a steel cutter bar 1, a thermal expansion chuck 2, and a milling tool 3. The inside of the steel cutter bar 1 is a stepped hollow structure. The matching short tapered structure, the other end is a long tapered structure matched with the thermal expansion chuck 2, one end of the thermal expansion chuck 2 is a through-hole structure, and the milling tool 3 is installed into the thermal expansion chuck 2 through shrink fit through hole.

Both ends of the steel tool bar 1 are provided with triangular threads on the inner ring surface, and one end of the thermal expansion chuck 2 is processed with a thread that matches the steel tool bar 1, and the thermal expansion chuck 2 is screwed on the steel tool bar 1 through threads On, the handle 4 is provided with a connecting screw 5 which is threadedly connected with the steel knife rod 1 .

The outer end of the steel cutter bar 1 is a long tapered or cylindrical structure with a taper of 0-4 degrees to reduce the interference with the workpiece.

The inside of the steel cutter bar 1 is processed into a stepped hollow structure to reduce its weight and improve its rigidity.

The inside of the steel cutter bar 1 is processed with threads.

The steel cutter bar 1 adopts an alloy material with better rigidity.

The outer ring surface of the thermal expansion chuck 2 is processed with threads.

The interior of the thermal expansion chuck 2 is a through-hole structure with a diameter of 1-6 mm.

The thermal expansion chuck 2 is made of a copper alloy material with a relatively high expansion coefficient.

The milling tool 3 is made of tungsten steel material with a low expansion coefficient, so as to facilitate its clamping in the thermal expansion chuck 2 .

The beneficial effect of the present invention is that the front end of the milling tool is clamped with high strength through the cooperation of the heat-expanding chuck and the steel cutter rod. Since the manufacturing cost of the steel cutter rod is much lower than that of the heat-shrinkable cutter rod, thermal The expansion chuck can hold milling tools with different diameters, so the specifications and models of the tool holder can be reduced, and the applicability is good.

At the same time, the milling tool in the present invention has good interchangeability by adopting standard parts; the thermal expansion chuck is connected with the steel cutter bar through fastening threads, the structure is simple and reliable, and the serial design of the thermal expansion chuck can be applied to different diameters The tool, and the steel tool holder will not be damaged in the process of processing, and the cost of installing a steel tool holder is much lower than that of using a heat shrinkable tool holder.

Description of drawings

Fig. 1 is a schematic diagram of the general assembly appearance structure of the present invention.

Fig. 2 is a schematic diagram of the sectional structure of the assembly of the present invention.

Fig. 3 is a schematic diagram of the structure of the handle.

Fig. 4 is a schematic cross-sectional structure diagram of the tool handle-connecting screw.

Fig. 5-Fig. 8 are schematic diagrams of the structure of the steel cutter bar.

Fig. 9 is a structural schematic diagram of different types of thermal expansion chucks.

In the figure: 1-steel tool holder, 2-thermal expansion chuck, 3-milling tool, 4-knife handle, 5-connecting screw.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1, the present invention includes a steel cutter bar 1, a thermal expansion chuck 2, and a milling tool 3; the inside of the steel cutter bar 1 is a stepped hollow structure, and one end is a short tapered structure matched with the handle 4, and the other One end is a long tapered structure matched with the thermal expansion chuck 2, and the inner ring surfaces of both ends are provided with triangular threads; the outer end of the thermal expansion chuck 2 is processed with a thread matched with the steel tool bar 1, and its The interior is a through-hole structure. The milling tool 3 is fitted into the through hole of the thermal expansion chuck 2 through shrink fit, and the thermal expansion chuck 2 is screwed onto the steel cutter bar 1, which is convenient for installation and strengthens the firmness of the connection. See Figures 1 through 9.

Embodiment 2, the outer end of the steel cutter bar 1 is long tapered or cylindrical, with a taper of 0 to 4 degrees to reduce interference with the workpiece, and its length can be selected according to actual processing conditions. Referring to Fig. 1 to Fig. 9, all the other are the same as embodiment 1.

Embodiment 3, the inside of the steel cutter bar 1 is processed into a stepped hollow structure to reduce its weight and improve its rigidity. Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Embodiment 4, the inside of the steel tool holder 1 is processed with connecting threads. One end is fixed on the tool handle 4 through the connecting screw 5 , and the other end is connected to the thermal expansion chuck 2 , so that the milling tool 3 is fixedly connected to the tool handle 4 . Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Embodiment 5, the steel cutter bar 1 is made of an alloy material with better rigidity. Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Embodiment 6, the outer ring surface of the thermal expansion chuck 2 is processed with fastening threads. Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

In Embodiment 7, the inside of the thermal expansion chuck 2 has a through-hole structure. In order to improve applicability, the inner diameter of the thermal expansion chuck 2 can also be designed in different sizes to adapt to milling tools 3 of different diameters. Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Embodiment 8, the thermal expansion chuck 2 is made of a copper alloy material with a relatively high expansion coefficient to enhance its ability to hold the milling tool 3 . Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

In Embodiment 9, the milling tool 3 is made of tungsten steel material with a low expansion coefficient to reduce its thermal expansion and facilitate its clamping in the thermal expansion chuck 1 . Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Embodiment 10. In the present invention, the milling tool 3 and the handle 4 can also be standard parts. After the above installation is completed, the spindle of the cutter handle 4 is connected to the spindle of the machining center. It increases interchangeability by selecting steel tool holders 1 of different lengths and sizes to match with the tool holder 4 according to different cutting conditions, thereby saving the manufacturing cost of the tool holder 4; it selects different lengths and inner diameters according to different machining accuracy The thermal expansion chuck 2 cooperates with the milling tool 3 to enhance flexibility, thereby reducing the manufacturing model of the tool holder. Refer to Fig. 1 to Fig. 9, all the other are the same as above-mentioned embodiment.

Claims (9)

1. a kind of combined high flexibility knife bar, it is characterized in that：It includes steel knife bar（1）, heat expansion folder cylinder（2）, milling cutter （3）, steel knife bar（1）Inside is stair-stepping hollow structure, and one end is and handle of a knife（4）The short taper profile structure of cooperation, the other end To press from both sides cylinder with heat expansion（2）The long pyramidal structure being engaged, heat expansion folder cylinder（2）One end is through-hole structure, milling cutter（3）Pass through heat Contracting fits into heat expansion folder cylinder（2）Through hole in, steel knife bar（1）Triangle thread, heat expansion are provided with the inner ring surface of both ends Press from both sides cylinder（2）One end is machined with and steel knife bar（1）The screw thread being engaged, heat expansion folder cylinder（2）Steel knife bar is tightened against by screw thread （1）On, handle of a knife（4）Inside it is provided with attachment screw（5）With steel knife bar（1）Screw thread is in mating connection, the steel knife bar（1）It is interior Portion is machined with connection screw thread, and one end passes through attachment screw（5）With being fixed on handle of a knife（4）On, other end connection heat expansion folder cylinder（2）, So that milling cutter（3）With handle of a knife（4）It is fixedly connected, according to different machining operating modes from different length and the steel of size Knife bar processed（1）With handle of a knife（4）It is engaged, increases interchangeability, so as to save handle of a knife（4）Manufacture spending；It according to difference by adding Work precision is from the heat expansion of different length and internal diameter folder cylinder（2）With milling cutter（3）It is engaged, enhancing is flexible, so as to reduce knife The manufacture model of bar.

2. combined high flexibility knife bar according to claim 1, it is characterized in that：The steel knife bar（1）Bored to be long outer end Shape or cylindrical structural, its taper are 0 ~ 4 degree.

3. combined high flexibility knife bar according to claim 1, it is characterized in that：The steel knife bar（1）It is processed into inside Stair-stepping hollow structure.

4. combined high flexibility knife bar according to claim 1, it is characterized in that：The steel knife bar（1）Inside is machined with Screw thread.

5. combined high flexibility knife bar according to claim 1, it is characterized in that：The steel knife bar（1）Using rigidity compared with Good alloy material.

6. combined high flexibility knife bar according to claim 1, it is characterized in that：The heat expansion presss from both sides cylinder（2）Outer end anchor ring adds Work has screw thread.

7. combined high flexibility knife bar according to claim 1, it is characterized in that：The heat expansion presss from both sides cylinder（2）Inside is through hole Structure, its a diameter of 1 ~ 6mm.

8. combined high flexibility knife bar according to claim 1, it is characterized in that：The heat expansion presss from both sides cylinder（2）It is using expansion The higher Cu alloy material of number.

9. combined high flexibility knife bar according to claim 1, it is characterized in that：The milling cutter（3）It is using expansion The relatively low wolfram steel material of number, in order to which it presss from both sides cylinder in heat expansion（2）In clamping.