CN212683265U - Special taper shank end milling cutter assembly for horizontal boring machine - Google Patents

Abstract

The utility model discloses a special taper shank end mill assembly for horizontal boring machine, which comprises a boring machine main shaft, a taper shank end mill cutter bar, a taper shank end mill cutter and a wedge, wherein a main shaft taper hole is arranged at the center of the boring machine main shaft, and a front end waist-shaped slot hole and a rear end waist-shaped slot hole are arranged on the circumferential side wall of the boring machine main shaft in parallel; the tail end of the taper shank vertical milling cutter rod is matched and sleeved with the main shaft taper hole, the front end of the taper shank vertical milling cutter rod is provided with a cutter rod taper hole matched and sleeved with a cutter handle of the taper shank vertical milling cutter, the center of the tail end of the taper shank vertical milling cutter rod is provided with a cylindrical counter bore, and a tensioning bolt in threaded connection with the cutter handle of the taper shank vertical milling cutter is arranged in the cylindrical counter bore; and a wedge groove communicated with the front end kidney-shaped groove hole is formed in the side wall of the tail end of the taper shank vertical milling cutter rod, and the wedge penetrates through the front end kidney-shaped groove hole and is matched with the wedge groove in a wedging fit manner. By adopting the taper shank end mill assembly, the stability of the milling cutter assembly is greatly improved, and the cutter falling phenomenon is avoided.

Description

Special taper shank end milling cutter assembly for horizontal boring machine

Technical Field

The utility model relates to a milling cutter assembly technical field, concretely relates to special taper shank end mill assembly of horizontal boring machine.

Background

When a horizontal boring machine mills special positions of certain workpieces, a taper shank end mill is used, at present, when the taper shank end mill is used for milling, because the cutting force is transmitted between the milling cutter and the cutter sleeve and between the cutter sleeve and the boring machine spindle only by the friction force generated by the Morse conical surface, the milling cutter is easy to be pulled out from the cutter sleeve by the axial tension and the alternating radial force which are generated in the milling process and are far away from the boring machine direction, namely, the end milling cutter is easy to loosen from the taper hole of the main shaft, commonly called as 'cutter falling', and no matter how tight the end milling cutter is knocked after being installed in the main shaft of the boring machine, the condition that the cutter is suddenly fallen in the milling process still exists, therefore, the processing quality is seriously influenced, even the workpieces are scrapped, safety accidents are easily caused, the spirit of an operator is highly nervous, the operator is not very much, and the operator is reluctant to use the taper shank end mill to mill on the boring machine, so that the application range of the boring machine is greatly limited.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a special taper shank end mill assembly of horizontal boring machine to improve the steadiness of milling cutter assembly, avoid falling the emergence of sword phenomenon.

The utility model discloses an above-mentioned problem is solved to following technical means:

a special taper shank end mill assembly for a horizontal boring machine comprises a boring machine spindle, a taper shank end mill cutter bar, a taper shank end mill cutter and a wedge, wherein a spindle taper hole is formed in the center of the boring machine spindle, and a front end waist-shaped slot hole and a rear end waist-shaped slot hole are formed in the circumferential side wall of the boring machine spindle in parallel; the tail end of the taper shank vertical milling cutter rod is matched and sleeved with the main shaft taper hole, the front end of the taper shank vertical milling cutter rod is provided with a cutter rod taper hole matched and sleeved with a cutter handle of the taper shank vertical milling cutter, the center of the tail end of the taper shank vertical milling cutter rod is provided with a cylindrical counter bore, and a tensioning bolt in threaded connection with the cutter handle of the taper shank vertical milling cutter is arranged in the cylindrical counter bore; and a wedge groove communicated with the front end kidney-shaped groove hole is formed in the side wall of the tail end of the taper shank vertical milling cutter rod, and the wedge penetrates through the front end kidney-shaped groove hole and is matched and wedged with the wedge groove.

Furthermore, one side surface of the wedge is matched with the arc surface of the front end waist-shaped slotted hole, and the other side surface of the wedge is an inclined surface.

Further, the inclined angle of the inclined plane of the inclined wedge is 3-5 degrees, and 4 degrees is preferable.

Further, the tension bolt is an inner hexagon tension bolt.

Further, the widths of the front end waist-shaped slot hole, the wedge groove and the wedge are consistent.

The utility model has the advantages that: the application discloses a special taper shank end mill assembly for a horizontal boring machine, which comprises a boring machine spindle, a taper shank end mill cutter rod, a taper shank end mill and a wedge, wherein a spindle taper hole is formed in the center of the boring machine spindle, and a front end waist-shaped slot hole and a rear end waist-shaped slot hole are formed in the circumferential side wall of the boring machine spindle in parallel; the tail end of the taper shank vertical milling cutter rod is matched and sleeved with the main shaft taper hole, the front end of the taper shank vertical milling cutter rod is provided with a cutter rod taper hole matched and sleeved with a cutter handle of the taper shank vertical milling cutter, the center of the tail end of the taper shank vertical milling cutter rod is provided with a cylindrical counter bore, and a tensioning bolt in threaded connection with the cutter handle of the taper shank vertical milling cutter is arranged in the cylindrical counter bore; and a wedge groove communicated with the front end kidney-shaped groove hole is formed in the side wall of the tail end of the taper shank vertical milling cutter rod, and the wedge penetrates through the front end kidney-shaped groove hole and is matched with the wedge groove in a wedging fit manner. By adopting the taper shank end mill assembly, the stability of the milling cutter assembly is greatly improved, and the cutter falling phenomenon is avoided.

More perfectly, the advantages of the present application are reflected in the following aspects: 1. when in use, the phenomenon of 'falling off' is completely eliminated, the processing quality of products is ensured, and the labor intensity of operators is reduced (no high tension is needed in spirit). 2. The potential safety hazard in processing is eliminated. 3. Simple manufacture, convenient use and long-term benefit. 4. The application range of the boring machine and the end milling cutter is expanded, the end milling cutter is used for horizontal peripheral milling, and the processing problem of certain special workpieces is solved. 5. The special taper shank vertical milling cutter rod for different boring machines can be designed according to the design principle of the invention.

Drawings

The invention is further described with reference to the following figures and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings, as shown in fig. 1: the embodiment provides a special taper shank end mill assembly for a horizontal boring machine, which comprises a boring machine spindle 1, a taper shank end mill bar 3, a taper shank end mill 4 and a wedge 5. The boring machine spindle 1 is characterized in that a spindle taper hole 103 is formed in the center of the boring machine spindle 1, the tail end of the taper shank vertical milling cutter rod 3 is matched and sleeved with the spindle taper hole 103, a cutter rod taper hole 301 matched and sleeved with a cutter handle of the taper shank vertical milling cutter 4 is formed in the front end of the taper shank vertical milling cutter rod 3, the tail end of the taper shank vertical milling cutter rod 3 and the spindle taper hole 103 as well as the cutter handle of the taper shank vertical milling cutter 4 and the cutter rod taper hole 301 meet the Morse taper design, the length and the related size of the taper shank vertical milling cutter rod 3 are matched and designed with the related size of the boring machine spindle 1.

The cylindrical counter bore 302 has been seted up at the tail end center of taper shank end mill cutter arbor 3, be provided with in the cylindrical counter bore 302 with the tensioning bolt 2 of taper shank end mill cutter 4's handle of a knife threaded connection, in this embodiment, the hexagon socket head tensioning bolt is chooseed for use to tensioning bolt 2, and tensioning bolt 2 chooses for use according to the size of the screw hole of taper shank end mill cutter 4 afterbody, and cylindrical counter bore 302 matches with tensioning bolt.

The side wall of the circumference of the boring machine main shaft 1 is provided with a front end waist-shaped slot hole 101 and a rear end waist-shaped slot hole 102 in parallel, the front end waist-shaped slot hole 101 is used for assembling the tapered wedge 5, and the rear end waist-shaped slot hole 102 is used for improving the convenience of disassembling the taper shank vertical milling cutter rod 3 (the tapered wedge for disassembling the boring machine can extend into the rear end waist-shaped slot hole 102). The side wall of the tail end of the taper shank vertical milling cutter rod 3 is provided with a wedge groove 303 communicated with the front end waist-shaped groove hole 101, the wedge 5 penetrates through the front end waist-shaped groove hole 101 and is matched with the wedge groove 303 for wedging, one side face of the wedge 5 is an arc surface 501 matched with the arc surface of the front end waist-shaped groove hole 101, and the other side face is an inclined plane 502. The front end waist-shaped slot hole 101, the wedge groove 303 and the wedge 5 are consistent in width.

When the taper shank vertical milling cutter is used, a cutter handle of the taper shank vertical milling cutter 4 is firstly installed in the cutter rod taper hole 301, the taper shank vertical milling cutter 4 is stably installed on the taper shank vertical milling cutter rod 3 by screwing the hexagon socket head cap tensioning bolt 2, then the tail end of the taper shank vertical milling cutter rod 3 is installed in the spindle taper hole 103, the wedge groove 303 is aligned with the front end waist-shaped groove hole 101, then the wedge 5 is inserted into the front end waist-shaped groove hole 101 and is lightly knocked down, and the taper shank vertical milling cutter rod 3 can be stably installed on the boring machine spindle 1. When the cutter is replaced, the hammer is used for lightly knocking the bottom of the wedge 5, the wedge 5 can be taken out after loosening, then the cutter unloading wedge of the boring machine is inserted into the rear-end kidney-shaped slot hole 102, the cutter unloading wedge is knocked, and the taper shank vertical milling cutter rod 3 is detached. And then, screwing out the tension bolt by using an inner hexagonal wrench, replacing a screw rod with proper length and the same thread as the tension bolt to be screwed into a threaded hole at the tail part of the taper shank end milling cutter, beating the tail part of the screw rod to loosen the taper shank end milling cutter, reversely screwing out the screw rod, taking out the taper shank end milling cutter, and replacing the worn taper shank end milling cutter for reuse.

In conclusion, by adopting the assembly of the special taper shank end mill for the horizontal boring machine of the embodiment, on one hand, the stability of the assembly of the taper shank end mill and the taper shank end mill rod is ensured by the tensioning bolt, and on the other hand, the stability of the assembly of the spindle of the boring machine and the taper shank end mill rod is ensured by the tapered wedge, and the axial loosening of the taper shank end mill rod is avoided. Therefore, the assembly stability of the milling cutter is greatly improved, the cutter falling phenomenon is avoided, the processing quality of products is ensured, and the labor intensity and potential safety hazard of operators are reduced.

As a further improvement to the technical scheme, the inclined angle of the inclined surface of the inclined wedge is 3-5 degrees. According to the self-locking principle of the inclined plane self-locking mechanism, the inclined plane inclination angle is smaller than or equal to the friction angle. According to the handbook of mechanical design, if the friction factor of the interference fit joint surface by the press-in method is tan β ═ μ ═ 0.1 (no lubrication), the self-locking critical angle β of the inclined plane inclination angle is 5 ° 45 ". In the embodiment, the inclination angle is 4 degrees, the self-locking requirement can be met, namely, the wedge can realize self-locking and cannot be separated when the spindle works, the taper shank vertical milling cutter rod can be tightly wedged on the spindle of the boring lathe through the wedge, the wedge is matched with a front end kidney-shaped slot hole on the spindle of the boring lathe in design and matched with the spindle, and related manufacturing tolerances are matched in preparation, so that accurate, stable and reliable connection is ensured.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (6)

1. The special taper shank end mill assembly for the horizontal boring machine is characterized in that: the boring machine comprises a boring machine main shaft, a taper shank vertical milling cutter rod, a taper shank vertical milling cutter and a wedge, wherein a main shaft taper hole is formed in the center of the boring machine main shaft, and a front end waist-shaped groove hole and a rear end waist-shaped groove hole are formed in the circumferential side wall of the boring machine main shaft in parallel; the tail end of the taper shank vertical milling cutter rod is matched and sleeved with the main shaft taper hole, the front end of the taper shank vertical milling cutter rod is provided with a cutter rod taper hole matched and sleeved with a cutter handle of the taper shank vertical milling cutter, the center of the tail end of the taper shank vertical milling cutter rod is provided with a cylindrical counter bore, and a tensioning bolt in threaded connection with the cutter handle of the taper shank vertical milling cutter is arranged in the cylindrical counter bore; and a wedge groove communicated with the front end kidney-shaped groove hole is formed in the side wall of the tail end of the taper shank vertical milling cutter rod, and the wedge penetrates through the front end kidney-shaped groove hole and is matched and wedged with the wedge groove.

2. The assembly of the special taper shank end mill for the horizontal boring machine as claimed in claim 1, wherein: one side surface of the wedge is matched with the arc surface of the front end waist-shaped slotted hole, and the other side surface of the wedge is an inclined surface.

3. The assembly of the special taper shank end mill for the horizontal boring machine as claimed in claim 2, wherein: the inclined angle of the inclined plane of the inclined wedge is 3-5 degrees.

4. The assembly of claim 3, wherein the assembly comprises: the inclined angle of the inclined plane of the inclined wedge is 4 degrees.

5. The assembly of the special taper shank end mill for the horizontal boring machine according to any one of claims 1 to 4, wherein: the tensioning bolt is an inner hexagonal tensioning bolt.

6. The assembly of claim 5, wherein the assembly comprises: the front end waist-shaped slotted hole, the wedge groove and the wedge are consistent in width.

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