CN216326522U

CN216326522U - Reverse milling clamp

Info

Publication number: CN216326522U
Application number: CN202122372391.8U
Authority: CN
Inventors: 赵善平; 李青; 黄勇; 袁秧林
Original assignee: Jiangsu Longning Hating Intelligent Technology Co ltd
Current assignee: Jiangsu Longning Hating Intelligent Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-04-19
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a reverse milling fixture, which comprises a fixture body, a set screw and a milling blade, wherein the fixture body is cylindrical, the upper end of the fixture body is provided with a clamping part, the lower end of the fixture body is provided with a milling cutter groove and a positioning screw hole, the milling cutter groove is a rectangular through groove which is formed along the radial direction of the fixture body, the positioning screw hole is axially formed in the central part of the bottom of the fixture body, and the positioning screw hole is communicated with the milling cutter groove; the end, facing upwards, of the milling blade is inserted into the milling cutter groove, the set screw is connected in the positioning screw hole in a threaded mode, and the head of the set screw abuts against the milling blade. The reverse milling fixture can be used for machining the bottom surface of a workpiece, different types of milling blades can be flexibly replaced according to needs, and the reverse milling fixture is extremely convenient to use.

Description

Reverse milling clamp

Technical Field

The utility model relates to the technical field of machine tool fixtures, in particular to a reverse milling fixture.

Background

The milling machine is a machine tool with wide application, and can process planes (horizontal planes and vertical planes), grooves (key grooves, T-shaped grooves, dovetail grooves and the like), tooth dividing parts (gears, spline shafts and chain wheels), spiral surfaces (threads and spiral grooves) and various curved surfaces on the milling machine. In addition, the method can be used for machining the surface and inner hole of the revolving body, cutting off the revolving body, and the like. When the milling machine works, a workpiece is arranged on a workbench or accessories such as an indexing head, the milling cutter rotates to move mainly, and the workpiece can obtain a required processing surface by the aid of the feeding motion of the workbench or the milling head.

When the machining surface is positioned on the bottom surface of the workpiece, the machining of the bottom surface needs to be completed by using a reverse milling fixture in cooperation with a milling cutter. Therefore, the reverse milling clamp which is simple in structure and convenient to use is designed, and the reverse milling clamp has important significance to the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reverse milling fixture.

The technical scheme adopted by the utility model is as follows:

a reverse milling fixture comprises a fixture body, a set screw and a milling blade, wherein the fixture body is cylindrical, the upper end of the fixture body is provided with a clamping part, the lower end of the fixture body is provided with a milling cutter groove and a positioning screw hole, the milling cutter groove is a rectangular through groove formed along the radial direction of the fixture body, the positioning screw hole is axially formed in the central part of the bottom of the fixture body, and the positioning screw hole is communicated with the milling cutter groove; the end, facing upwards, of the milling blade is inserted into the milling cutter groove, the set screw is connected in the positioning screw hole in a threaded mode, and the head of the set screw abuts against the milling blade.

Furthermore, the inlet end and the outlet end of the milling cutter groove are both provided with a trapezoidal enlarged part.

Further, the clamping portion is formed by a cylindrical body which is contracted radially inward.

Further, the outer periphery of clamping part is equipped with a plurality of arc recesses in the axial, arc recess is along clamping part circumference evenly distributed.

Furthermore, the bottom surface of the milling cutter blade is provided with a plurality of semicircular holes matched with the set screws, and the semicircular holes are uniformly distributed along the length of the milling cutter blade.

Further, the edge of the milling blade is linear or curved.

The utility model has the beneficial effects that: according to the reverse milling fixture, the milling cutter groove and the positioning screw hole are arranged in the fixture body, the milling cutter blade is inserted into the milling cutter groove and is fastened through the fastening screw, the fixture body is clamped on the milling head of the milling machine through the clamping part, the bottom surface of a workpiece can be machined, different types of milling cutter blades can be flexibly replaced according to needs, and the reverse milling fixture is extremely convenient to use. Therefore, the reverse milling fixture is simple in structure and convenient to use.

Drawings

Fig. 1 is a schematic structural view of a reverse milling fixture of the present invention.

Fig. 2 is a schematic structural view of the clamp body of the present invention.

Fig. 3 is a sectional view taken along the direction B-B of fig. 2.

Fig. 4 is a top view of fig. 2.

Fig. 5 is a schematic view of the milling insert of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings and a preferred embodiment.

Referring to fig. 1 to 5, the embodiment provides a reverse milling fixture, which includes a fixture body 10, a set screw 30 and a milling insert 20.

The clamp body 10 is cylindrical, and has a clamping portion 11 at an upper end thereof, and in this embodiment, the clamping portion 11 is formed by a cylinder which is shrunk radially inward. The outer periphery of clamping part 11 is equipped with a plurality of arc recesses 111 in the axial, arc recesses 111 are along clamping part 11's circumference evenly distributed. The arc-shaped groove 111 enables the clamp body 10 to be clamped on the milling cutter head more stably, and prevents the clamp body 10 from rotating during machining.

The lower end of the fixture body 10 is provided with a milling cutter groove 121 and a positioning screw hole 123, wherein the milling cutter groove 121 is a rectangular through groove formed along the radial direction of the fixture body. In this embodiment, the entrance end and the exit end of the milling flutes are provided with trapezoidal enlargements 122. The provision of the trapezoidal enlargement 122 facilitates insertion of the milling insert 20. Trapezoidal enlargements 122 are provided at both ends to allow insertion of milling insert 20 from either side. The positioning screw hole 123 is axially arranged at the center of the bottom of the fixture body, and the positioning screw hole 123 is communicated with the milling cutter groove 121.

The width and height of the milling cutter blade 20 are matched with those of the milling cutter groove 121, and the cutting edge of the milling cutter blade 20 is linear or curved. The end of the milling cutter blade 20 facing upwards is inserted into the milling cutter groove 121, the set screw 30 is screwed into the positioning screw hole 123, and the head of the set screw 123 abuts against the bottom surface of the milling cutter blade 20. The milling insert 20 is secured in place in the milling cutter pocket 121 by the set screw 30.

In this embodiment, the bottom surface of the milling insert 20 is provided with a plurality of semicircular holes 201 adapted to the set screws 123, and the semicircular holes 201 are uniformly distributed along the length of the milling insert 20. The semicircular hole 201 is configured to allow the head of the set screw to be inserted into the semicircular hole to further secure the milling insert against sliding during machining. The length of the milling cutter blade extending out of the clamp body can be conveniently adjusted according to needs through the semicircular holes 201.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and the improvements and modifications are also within the protection scope of the present invention.

Claims

1. A reverse milling fixture comprises a fixture body, a set screw and a milling blade, and is characterized in that the fixture body is cylindrical, a clamping part is arranged at the upper end of the fixture body, a milling cutter groove and a positioning screw hole are arranged at the lower end of the fixture body, the milling cutter groove is a rectangular through groove formed along the radial direction of the fixture body, the positioning screw hole is axially formed in the central part of the bottom of the fixture body, and the positioning screw hole is communicated with the milling cutter groove; one end of the milling blade is inserted into the milling cutter groove, and the other end of the milling blade extends out of the fixture body upwards; the set screw is in threaded connection with the positioning screw hole, and the head of the set screw abuts against the milling cutter blade.

2. A reverse milling fixture as claimed in claim 1, wherein the entry and exit ends of the milling flutes are provided with trapezoidal enlargements.

3. A back-milling fixture as claimed in claim 1, wherein the clamping portion is formed by a cylindrical body which is radially inwardly tapered.

4. The reverse milling fixture according to claim 3, wherein the outer circumferential surface of the clamping portion is provided with a plurality of arc-shaped grooves in an axial direction, and the arc-shaped grooves are uniformly distributed along the circumferential direction of the clamping portion.

5. The reverse milling fixture as claimed in claim 1, wherein the bottom surface of the milling insert is provided with a plurality of semicircular holes adapted to the set screws, and the semicircular holes are uniformly distributed along the length of the milling insert.

6. A back milling fixture as claimed in claim 1, wherein the milling insert edge is linear or curved.