CN111618636A - Transfusion and power transmission assembly structure of tool holder - Google Patents

Abstract

The present invention provides a fluid and power delivery assembly for a tool holder for use with a machine tool having a spindle providing power and coolant, the assembly comprising: a hollow shank portion received in the spindle, the hollow shank portion being provided with a structure forming an electrical or pneumatic structure with the spindle; a hollow tool mounting portion including an axially extending tool mounting aperture capable of receiving and securing a portion of a tool; a power unit fixedly arranged in the hollow tool mounting part and capable of receiving power and generating power which is transmitted to the tool through the tool mounting hole; and a watertight separator for separating a central channel into an infusion channel and a cable guide hole or an air pipe which are independent from each other.

Description

Infusion and power transmission assembly structure of tool holder

technical field

The invention relates to a tool holder, in particular to a fluid infusion and power transmission assembly structure of the tool holder.

Background technique

High-precision metal processing, such as drilling, milling, reaming, boring, inner and outer diameter cutting or surface grinding, etc., often use Computer Numerical Control (CNC) processing machines, which are fixed with tool holders For example, drills, milling cutters and other tools are processed.

The processing machine uses coolant and/or cutting fluid (hereinafter simply referred to as coolant) to firstly cool the workpiece and the cutting tool to improve the performance of the machine operation. The coolant also lubricates the workpiece and cutting tools to reduce the build-up of frictional heat. The use of coolant also helps prevent chips from falling to the cutting tool and flushes cut chips away from the processing table.

In the prior art, coolant is supplied to the work piece by means of manually positioned hoses and nozzles. Such a system may generally include a gooseneck hose or similar combination originating from a cooling pump adjacent or coupled to the machine tool. In recent years, cooling systems have been developed to supply coolant to a cutting tool holder or collet. Coolant can be supplied through the mandrel of the machining table or from a collar secured around the tool holder.

In addition, in the existing ultrasonic processing machine (Ultrasonic Machining, USM), the ultrasonic vibration unit is installed on a rotating spindle, so that the high-frequency vibration generated by the ultrasonic wave is transmitted to a tool through a tool holder, The tool has functions such as high-speed rotation and ultrasonic high-frequency vibration, and can be used for various grinding or cutting processes, especially for precision machining of hard and brittle materials.

When using the ultrasonic processing machine for processing, the cutting surface of the tool continuously vibrates at high frequency and separates from the chip, which significantly improves the adverse effect caused by high temperature and high pressure between the chip and the cutting surface of the processing tool, thereby preventing chatter lines, reducing Cutting resistance, reducing machining strain, effectively improving chip evacuation and effectively improving the machining surface and other cutting operations.

When the ultrasonic processing machine is working, the vibration source is generated by the ultrasonic vibration unit, and is transmitted to the tool tip through the tool holder, so that the ultrasonic high-frequency vibration processing operation is performed on a workpiece. During the ultrasonic processing operation, in addition to the ultrasonic high-frequency vibration, the various parts of the ultrasonic processing machine are in contact with each other, and unexpected unexpected vibrations will inevitably occur; this unexpected unexpected vibration and the ultrasonic high-frequency vibration produce mutual interference. , and then affect the processing process, which has an adverse effect on the product accuracy.

The elongated tool holder with extended length or the combined connection type tool holder disclosed in patent cases such as USP1502528, USP2716030 and USP8821084 are often held by the tool when a high slenderness ratio (L/D) is applied. Influenced by the rigidity and precision of the material of the tool, the problem of poor processing quality or inability to process is the processing bottleneck faced by the current processing machine; or when the above-mentioned tool holder is used in an ultrasonic processing machine, due to the high ultrasonic wave The transmission path of the high-frequency vibration source is lengthened, and the mutual interference between the ultrasonic vibration and the above-mentioned unexpected vibration will be more serious. The position of the maximum amplitude point of the tool is more difficult to control at the nose position of the tool, resulting in undesired cutting performance, such as poor workpiece surface finish and out-of-tolerance machined workpiece; A bad case results in irreparable damage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a liquid infusion and power transmission assembly structure of the tool holder, mainly by setting the power unit at the front position of the inner front end of the tool holder, effectively shortening the power transmission path, avoiding the tool clamp Due to the excessively long power transmission path, the holder produces undesired connection vibration, and maintains a better workpiece surface finish and machining precision. In line with the requirements of the front-mounted power unit for power and coolant delivery, the present invention further provides an infusion and power transmission assembly structure, so that power transmission and coolant are separated, and are respectively transported from the rear end of the tool holder to the back end of the tool holder in a non-interfering manner. Tool holder front or front exit.

The second object of the present invention is to provide a liquid infusion and power transmission assembly structure of a tool holder, which can improve the problem of reduced rigidity and increased deflection due to the lengthening of the tool holder, and overcome the high slenderness ratio. The rigidity of the tool holder is insufficient, and the slenderness ratio can be shortened. As shown in Figure 1, the slenderness ratio of the tool holder is shortened from L1/D without an ultrasonic vibrator to a front-mounted ultra The L/D of the sonic vibrator and the length of the tool holder can be continuously increased, and the slenderness ratio is maintained at a fixed value of L/D, and is not limited by the length of L1.

Another object of the present invention is to provide a liquid infusion and power transmission assembly structure for a tool holder, which is especially suitable for use in various elongated tool holders with different lengths or combined connection type tool holders. ; Can also be used in single-length tool holders.

The fluid infusion and power transmission assembly structure of a tool holder that can achieve the purpose of the above invention is used in combination with a processing machine that provides a power supply and a coolant through a mandrel, and the tool holder includes: A hollow handle part in the shaft, an electrical structure is arranged on the hollow handle part, and the electrical structure forms an electrical connection with the mandrel to conduct the power supply to the tool holder; a hollow tool erection part includes a An axially extending tool erection aperture, which can accommodate and fix a part of a tool; a power unit fixed in the hollow tool erection portion, the power unit is electrically connected to the electrical structure and can receive the power supply And generate a power, the power is transmitted to the tool through the hollow tool mounting part; a central channel defined by the hollow handle and the hollow tool mounting part; and a water-tight partition, which can partition the central channel An infusion channel and a cable guide hole are independent of each other, which can respectively transport the power supply and the coolant in a non-interfering manner.

In a preferred embodiment of the present invention, the watertight partition member is composed of a plurality of partition pipe units connected in series with each other.

In a preferred embodiment of the present invention, the hollow handle is provided with an axially extending first coolant port for receiving coolant from the mandrel and delivering the coolant to the the infusion channel.

In a preferred embodiment of the present invention, the power unit is selected from one of an ultrasonic vibration unit, an electric unit and a pneumatic unit.

In a preferred embodiment of the present invention, the hollow tool erection part further comprises: an elastic collet, the tool erection aperture is formed inside the elastic collet, and a plurality of shafts parallel to each other and open at one end are arranged on the elastic collet Toward the grooves, a plurality of elastic claws are formed between several axial grooves; and a locking piece, when the locking piece is locked, the elastic claws are elastically deformed by exerting force on the plurality of elastic claws, and then inwardly Clamps the tool mounted in the collet.

In a preferred embodiment of the present invention, the hollow tool erecting portion is provided with an axially extending second coolant port, and the second coolant port is used for receiving the coolant from the infusion channel and delivering the coolant to the collet.

In a preferred embodiment of the present invention, it further includes at least one extension sleeve module serially connected between the hollow handle portion and the hollow tool erecting portion.

In a preferred embodiment of the present invention, the extension sleeve module has a male connector end and a female connector end, so that the extension sleeve modules can be connected in series with each other end to end.

In the infusion and power transmission assembly structure of the tool holder provided by the present invention, the power unit is arranged on the hollow tool erection part for fixing the tool, which can effectively shorten the power transmission path and prevent the tool holder from being affected by the power transmission path. If it is too long, it will cause undesired connection vibration. At the same time, it solves the problem of insufficient rigidity that cannot be solved by the high slenderness ratio tool holder during processing, and maintains better workpiece surface finish and machining precision. In accordance with the requirements of the front-mounted power unit for power and coolant delivery, the present invention further provides an infusion and power transmission assembly structure, so that the power and the coolant are respectively transported from the rear end of the tool holder to the tool holder in a non-interfering manner. the front of the holder or the front exit. In particular, an elongated tool holder with an extended length or a combined connection type tool holder is particularly suitable for the infusion and power transmission assembly structure of the tool holder provided by the present invention.

Description of drawings

1 is a cross-sectional view of the infusion and power transmission assembly structure of the tool holder of the present invention;

FIG. 2 is an enlarged view of the hollow tool erection part in FIG. 1 .

Detailed ways

Please refer to FIG. 1 and FIG. 2 at the same time, the fluid infusion and power transmission assembly structure of the tool holder provided by the present invention is used for a processing machine that provides a power supply and a coolant through a mandrel (not shown in the figure). Used in combination, the tool holder includes: a hollow shank 10 accommodated in the mandrel, an electrical structure 11 is provided on the hollow shank 10, and the electrical structure 11 is electrically connected to the mandrel for guiding Connect the power supply to the electrical structure 11; a hollow tool erection portion 20, including an axially extending tool erection aperture 21, the tool erection aperture 21 can accommodate and fix a part of a tool (not shown) (such as a tool handle) ); a power unit 30 fixed in the hollow tool erection portion 20, the power unit 30 is electrically connected to the electrical structure 11, and can receive the power supply and generate a power, which is transmitted through the tool erection aperture 21 to the tool; a central channel 50 defined by the hollow handle portion 10 and the hollow tool erection portion 20 ; and a watertight partition 51, which can partition the central channel 50 into an infusion channel 52 and an infusion channel that are independent of each other. A cable guide hole 53 can respectively deliver the power supply and the coolant in a non-interfering manner. The front-mounted power unit 30 configured as described above can effectively shorten the power transmission path.

The power unit 30 is selected from one of an ultrasonic vibration unit, an electric unit and a pneumatic unit. When the power unit 30 is a pneumatic unit, those skilled in the art should be able to replace the electrical structure 11 with a pneumatic structure and replace the cable guide hole 53 with an air pipe.

The hollow shank 10 has a tapered outer surface 15 that is configured to be received in a mandrel of a processing machine so that the tool holder and the mandrel are aligned and axially tightly coupled.

The hollow handle 10 is provided with an axially extending first coolant port 16 for receiving coolant from the mandrel and delivering the coolant to the infusion channel 52 .

The hollow tool mounting portion 20 can be substantially a cylindrical component, which is further provided with an elastic chuck 22 , the tool mounting aperture 21 is formed in the elastic chuck 22 , and a plurality of parallel and mutually parallel holes 21 are formed on the elastic chuck 22 . An axial groove 23 with one end open, and a plurality of elastic claws 24 are formed between several axial grooves 23; and a locking member 25 is provided outside the elastic chuck 22. The elastic deformation caused by the force on the plurality of elastic claw pieces 24 further clamps the tool installed in the elastic chuck 22 inward. The above-mentioned method of using the elastic chuck 22 to lock the tool is not the only option, and those skilled in the art should understand that other methods of fixing the tool can be used.

The watertight spacer 51 is composed of a plurality of spacer pipe units 54 connected in series; the head and tail ends of the spacer 51 are respectively connected with the inner surfaces of the hollow handle 10 and the hollow tool erection part 20 with different diameters to form a tight connection state, not only has the effect of positioning, but also has the effect of maintaining watertightness. O-rings, gaskets or other leak-proof components are provided at the above-mentioned connections and at the serial connection of each of the separating pipe units 54 to maintain the watertight effect of the infusion channel 52 and the cable guide hole 53 . Similarly, in other states such as gas delivery, the water-tight leak-proof member can also be upgraded to an air-tight leak-proof member, which should be an equivalent embodiment that is obvious to those skilled in the art.

The watertight partition 51 composed of a plurality of dividing pipe units 54 connected in series with each other forms a circular cross-section infusion channel 52 in the inner hole of the dividing pipe unit 54; Between the inner walls of 50, a cable guide hole 53 with an annular section is formed.

The hollow tool mounting portion 20 is provided with an axially extending second coolant port 27 for receiving the coolant from the infusion channel 52 and delivering the coolant to the collet 22 .

The electrical structure 11 is electrically connected to the power unit 30 via a cable 13 passing through the cable guide hole 53 . Between the electrical structure 11 and the mandrel of the processing machine, a non-contact conductive connection can be used, for example, using electromagnetic induction to energize, etc.; of course, the electrical structure 11 and the mandrel of the processing machine can also be used. Contact type conductive connection of two electrodes , the power of the power source can be supplied to the electrical structure 11 , which is not described herein.

In another preferred embodiment of the present invention, between the hollow handle portion 10 and the hollow tool erecting portion 20 , at least one extension sleeve module 40 is further disposed, and each extension sleeve module 40 has a male end portion 41 and a female connector end 42, and a corresponding male connector end 14 is arranged on the hollow handle 10, and a corresponding female connector end 26 is arranged on the hollow tool erecting part 20, so that each extension sleeve module 40 can be Connected to the hollow handle portion 10 and the hollow tool erection portion 20 , the extension sleeve modules 40 can also be connected to each other end to end. The user can select the number of the extension sleeve modules 40 to be used according to the processing needs, so as to adjust the required length of the tool holder.

In the infusion and power transmission assembly structure of the tool holder provided by the present invention, the power unit is arranged on the hollow tool erection part for fixing the tool, which can effectively shorten the power transmission path and prevent the tool holder from being affected by the power transmission path. If it is too long, it will cause undesired connection vibration. At the same time, it solves the problem of insufficient rigidity that cannot be solved by the high slenderness ratio tool holder during processing, and maintains better workpiece surface finish and machining precision. In accordance with the requirements of the front-mounted power unit for power and coolant delivery, the present invention further provides an infusion and power transmission assembly structure, so that the power and the coolant are respectively transported from the rear end of the tool holder to the tool holder in a non-interfering manner. the front of the holder or the front exit. In particular, an elongated tool holder with an extended length or a combined connection type tool holder is particularly suitable for the infusion and power transmission assembly structure of the tool holder provided by the present invention.

The above description is only illustrative rather than restrictive for the present invention. Those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the claims. All will fall within the protection scope of the present invention.

Claims (8)

1. An infusion and power delivery assembly for a tool holder for use with a machine that provides a power source and a coolant through a spindle, the tool holder comprising:

a hollow shank portion received in the spindle, the hollow shank portion having an electrical structure disposed thereon, the electrical structure being in electrical communication with the spindle for conducting the power source to the tool holder;

a hollow tool mounting portion including an axially extending tool mounting aperture capable of receiving and securing a portion of a tool;

a power unit fixedly arranged in the hollow tool erecting part, electrically connected to the electrical structure and capable of receiving the power supply and generating power, wherein the power is transmitted to the tool through the hollow tool erecting part;

a central passage defined by the hollow shank portion and the hollow tool mounting portion; and

a water-tight separator for separating the central channel into an infusion channel and a cable guide hole independent of each other and for separately delivering the power supply and the coolant without mutual interference.

2. The fluid delivery and power delivery assembly structure for a tool holder of claim 1, wherein: the watertight separator consists of a plurality of separating pipe units which are connected end to end in series.

3. The fluid delivery and power delivery assembly structure for a tool holder of claim 1, wherein: the hollow shank portion is provided with an axially extending first coolant port for receiving coolant from the spindle and delivering the coolant to the infusion passage.

4. The fluid delivery and power delivery assembly structure for a tool holder of claim 1, wherein: the power unit is one of an ultrasonic vibration unit, an electric unit and a pneumatic unit.

5. The fluid delivery and power delivery assembly structure for a tool holder of claim 1, wherein: this cavity instrument erects portion still includes: the tool mounting hole is formed in the elastic chuck, a plurality of axial grooves which are parallel to each other and have one open end are formed on the elastic chuck, and a plurality of elastic claw pieces are formed among the axial grooves; and when the locking piece is locked, the locking piece applies force to the plurality of elastic claw sheets to enable the elastic claw sheets to elastically deform, and then the tool arranged in the elastic chuck is clamped inwards.

6. The power delivery and transmission assembly structure for a tool holder of claim 5, wherein: the hollow tool mounting portion is provided with an axially extending second coolant port for receiving coolant from the fluid delivery passage and delivering the coolant to the collet.

7. The fluid delivery and power delivery assembly structure for a tool holder of claim 1, wherein: also includes at least one extension sleeve module connected in series between the hollow handle portion and the hollow tool mounting portion.

8. The fluid delivery and power delivery assembly structure for a tool holder of claim 7, wherein: the extension sleeve module is provided with a male joint end part and a female joint end part, so that the extension sleeve modules can be connected in series end to end.

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