CN-116810570-B - Groove back chipping milling grinding head

CN116810570BCN 116810570 BCN116810570 BCN 116810570BCN-116810570-B

Abstract

The invention provides a groove back chipping milling head, and belongs to the field of precision machining. The milling head comprises an outer matrix and a diamond ring, wherein the outer matrix and the diamond ring are hollow and vertically communicated, the lower end of the outer matrix is connected with the diamond ring, the lower end of the inner matrix extends into the outer matrix and is connected to the inner wall of the outer matrix through a blade wheel, a water storage area is a space area formed above the blade wheel between the outer matrix and the inner matrix, the water storage area is communicated with the outside through a gap between the upper end of the outer matrix and the inner matrix, the diamond ring is formed by connecting a plurality of toothed structures in a circle, an inner water tank and an outer chip removal tank are further arranged on the diamond ring, an external cooling mode is converted into an internal cooling mode in the whole device, smooth outflow of water is guaranteed, the water storage area provides temporary storage of water, the blade wheel is more easily brought to a grinding working area in rotation, grinding performance is improved, the toothed structure of the diamond ring can achieve disposable processing completion, no back chipping treatment is needed, and cost is greatly reduced.

Inventors

SONG JINGXIN
Liang anning
LONG HUILING
XIE MINGXING
ZHAO LIANG
WANG ZHIYONG
WANG WEIJIAN
SONG YOUPENG

Assignees

宋京新
桂林创源金刚石有限公司

Dates

Publication Date: 20260508
Application Date: 20211230

Claims (7)

1. The utility model provides a recess back chipping mills bistrique which characterized in that includes: the milling machine comprises an inner base body (1), a milling grinding head (2), a water storage area (3) and a blade wheel (4); The milling head (2) consists of an outer matrix (21) and a diamond ring (22), wherein the outer matrix (21) and the diamond ring (22) are hollow and are arranged in a vertically penetrating manner, the lower end of the outer matrix (21) is connected with the diamond ring (22), the lower end of the inner matrix (1) extends into the outer matrix (21) and is connected to the inner wall of the outer matrix (21) through the impeller (4), the water storage area (3) is a space area formed above the impeller (4) between the outer matrix (21) and the inner matrix (1), and the water storage area (3) is communicated with the outside through a gap between the upper end of the outer matrix (21) and the inner matrix (1); The diamond ring (22) is formed by connecting a plurality of toothed structures in a circle, wherein the tooth root is positioned at the outer side of the ring shape, and the tooth tip is positioned at the inner side; The diamond ring (22) is also provided with an inner water tank (221) and an outer chip removal tank (222), the inner water tank (221) is positioned at the inner side of the diamond ring (22) and is communicated with the inner space of the diamond ring (22), the outer chip removal tank (222) is positioned at the outer side of the diamond ring (22) and is communicated to the outer side of the diamond ring (22), and the radius of the inner circle at the tooth root is equal to the radius of the inner circle corresponding to the outermost end of the inner water tank (221); The radius of the back chipping to be ground of the diamond ring (22) is R, the maximum wall thickness of the diamond ring (22) is B, B is less than or equal to R, the distance from the radially innermost part of the inner water groove (221) to the inner wall of the diamond ring (22) is B, the rounded transition between the lower end of the outer wall of the diamond ring (22) and the bottom end surface is R1, R1 = B-B, 0<B-B < R is formed, and the distance from the radially innermost part of the outer chip groove (222) to the inner wall of the diamond ring (22) is B1, wherein 0<B-B1 is less than or equal to 0.5mm.
2. The groove back chipping milling head according to claim 1 wherein the outer base body (21) and the diamond ring (22) are each cylindrical.
3. The groove back chipping milling head according to claim 2, characterized in that a horn-shaped water inlet (211) is arranged at the upper end of the outer base body (21), the water storage area (3) is a space area formed by the inner wall of the outer base body (21), the outer wall of the lower end of the inner base body (1), the water inlet (211) and the blade wheel (4), and the upper end of the water storage area (3) is communicated with the outside through a gap between the water inlet (211) and the lower end of the inner base body (1).
4. A recess back-gouging milling head in accordance with claim 3, wherein the inner wall of the outer base (21) is inclined along the central axis and forms an inclination angle θ,0< θ <45 °, and the inner wall of the water inlet (211) is inclined along the central axis at an inclination angle θ1,0< θ1<90 °.
5. The groove back chipping milling head according to claim 1 wherein the inner water groove (221) and the outer junk groove (222) are vertically disposed and vertically penetrate the diamond ring (22).
6. The groove back chipping milling head according to claim 1 wherein the inner water groove (221) and the outer chip groove (222) are each provided in plurality and alternately arranged at intervals in a circumferential direction of the diamond ring (22).
7. The groove back-gouging milling head of any one of claims 1 to 6, wherein the blade wheel (4) comprises a plurality of blades, the blades being arranged obliquely to the lower end of the inner base body (1) for transporting water in the water reservoir (3) to the lower working end of the milling head (2) as the inner base body (1) rotates.

Description

Groove back chipping milling grinding head Technical Field The invention relates to the field of precision machining, in particular to a groove back chipping milling grinding head. Background When the groove is machined, the outer circle working surface of the powder metallurgy sintered diamond grinding head and the stressed part at the bottom end of the groove are easy to be worn and deformed by the grinding head to generate a circular arc with a larger radius, and the occurrence of the large circular arc often leads to errors of a workpiece in the assembly or positioning process, so that the size of the circular arc is eliminated or reduced, and the assembly precision can be improved. In this regard, to back chipping and eliminating a large arc, a new grinding head tool is often required to be replaced, or a grinding head special for back chipping with a small radius is often replaced, so that the operation is complicated, and the tool is required to be re-aligned, which is time-consuming and laborious. The reason for causing the bottom and the side wall of the workpiece groove to form a larger arc is as follows: 1. when the grinding head processes the groove, the chip removal condition is poor, and the boundary line/transition section part of the grinding tool is more easily worn; 2. particularly, when an external cooling mode is adopted under the condition of no internal cooling structure, the cooling effect is poor, the boundary line/transition section part of the grinding tool is easier to heat, the capacity of the bonding agent for holding the diamond is reduced, and the diamond is easy to fall off; 3. diamond particles at the boundary line/transition section of the grinding tool are stressed more than other parts, and are also the reasons for the diamond to fall off more easily. When the transition sections of the larger circular arcs at the bottom and the side walls of the workpiece groove are required to be back-gouged, particularly when the workpiece groove is precisely machined, the frequency of the shape trimming of the grinding head is extremely high, the process is complicated, the machining procedures are increased, and the cost is increased. The prior art has the solutions that an annular grinding tool is manufactured, the wall thickness of the annular grinding tool is controlled to be smaller than 15% of the diameter to limit the upper limit of the arc radius of the boundary line/transition section of the working surface at the bottom end of the grinding tool and the working surface of the outer circle, but the wall thickness is possibly too thin due to the smaller diameter and limited by the strength of a ring, the tolerance is reduced due to the too thin ring width, the processing work efficiency is affected, and the grinding head manufactured by the method has poor anti-deformation capability and still needs frequent shaping and repairing. In order to reduce the procedures, save the cost and achieve the purpose of back chipping, a back chipping grinding tool which does not need to be replaced and can be directly used in one step is needed. Disclosure of Invention The invention aims to overcome at least one defect of the prior art, and provides the groove back chipping milling head which is ingenious in design, simple and convenient to operate, time-saving and labor-saving. The technical scheme for solving the technical problems is as follows, the groove back chipping milling head comprises: The device comprises an inner matrix, a milling grinding head, a water storage area and a blade wheel; The milling head consists of an outer matrix and a diamond ring, wherein the outer matrix and the diamond ring are hollow and are vertically communicated, the lower end of the outer matrix is connected with the diamond ring, the lower end of the inner matrix extends into the outer matrix and is connected to the inner wall of the outer matrix through the vane wheel, the water storage area is a space area formed above the vane wheel between the outer matrix and the inner matrix, and the water storage area is communicated with the outside through a gap between the upper end of the outer matrix and the inner matrix; The diamond ring is formed by connecting a plurality of toothed structures in a circle, wherein the tooth root is positioned at the outer side of the ring shape, and the tooth tip is positioned at the inner side; The diamond ring is also provided with an inner water tank and an outer chip groove, the inner water tank is positioned at the inner side of the diamond ring and communicated with the inner space of the diamond ring, the outer chip groove is positioned at the outer side of the diamond ring and communicated to the outer side of the diamond ring, and the radius of the inner circle at the tooth root is equal to the radius of the inner circle corresponding to the outermost end of the inner water tank; The radius of the back chipping of the diamond ring to be ground is R, the maximum wal