CN214602295U

CN214602295U - Reaming device for dissimilar material hole

Info

Publication number: CN214602295U
Application number: CN202022958857.8U
Authority: CN
Inventors: 段爱平; 张建强; 王卓; 臧磊; 林江; 王国栋; 李守东; 岳锋; 齐学会
Original assignee: Inner Mongolia First Machinery Group Corp
Current assignee: Inner Mongolia First Machinery Group Corp
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-05
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a reaming device for holes made of dissimilar materials, which comprises a movable handle (1), a pin (2), a spring (3), a jackscrew (4), a spiral reamer (5), a fixed handle (6), a small steel ball (9), a cutter clamping sleeve (10), a hole (11) and a supporting pin (12); the utility model discloses an optimize the cutter structure, replace original boring mode with the handle of a knife reaming that floats, the reamer is by the helicla flute replace the straight flute to adopt carbide tool material, improve wearing and tearing, chip removal and the self-centering ability of cutter. By utilizing a metal cutting mechanism and changing geometric parameters of the reamer, a blade inclination angle of 15-20 degrees can be ground at the cutting part of the reamer, chips during reaming are guaranteed to be smoothly discharged to a chip removal groove from a front tool face, and extrusion deformation of the cut and machined surface is reduced. The position precision of the hole after reaming is ensured.

Description

Reaming device for dissimilar material hole

Technical Field

The utility model belongs to the technical field of the dissimilar material processing, concretely relates to reaming device for dissimilar material hole.

Background

When the pore diameter of a sectional hole made of a dissimilar material is processed, in the processing, aiming at the conventional processing condition of ensuring the pore diameter, the prior art generally adopts the following steps: 1, the traditional method is to utilize a single-blade fine-adjustment hard alloy boring cutter to carry out boring processing; 2, trial cutting is firstly carried out on the hole opening by controlling the fine adjustment amount of the boring cutter, and after the measurement meets the requirement, the boring machining of the hole is completed.

In the processing process of the prior art, the effect is ensured aiming at the consistency of the aperture precision of the dissimilar materials, and the method has the following limitations: 1 the traditional method is to utilize a single-edge fine-tuning hard alloy boring cutter to carry out boring processing, and because of the difference of hardness, plasticity and comprehensive cutting performance of different materials, the wear degree of the cutter, the chip removal condition and the cutter relieving amount of cutter bar stress are different during processing, so that the aperture sizes of the front section hole and the rear section hole are different. 2, particularly for dissimilar material sectional hole parts with the hole diameter smaller than 30mm, the machining vibration is large, the chip removal is difficult, the casting effect of the cooling liquid is poor, and the machining precision is difficult to guarantee by adopting a conventional small boring cutter boring feeding mode for machining. 3 when a single-edge fine boring cutter is used for boring, the cutting consumption is generally 0.15-0.3mm, when a material with higher strength in different materials is processed, the cutting force is large, the cutter back-off amount is larger than that of a material with lower strength, and if the requirement on the precision of the aperture size is higher, the aperture sizes of two sections of different materials are difficult to guarantee at the same time. 4 if the boring allowance is less than 0.15mm, the tool and the workpiece rub during boring on the steel parts, and the requirement of surface roughness cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a reaming device for dissimilar material hole, the technical problem who solves is: the problem of when having the different segmentation material in the hole of processing, because the hardness, plasticity, the comprehensive cutting performance of different materials lead to during processing cutter wearing and tearing degree, chip removal condition, cutter arbor atress make the sword volume all different, make the aperture size nonconformity in two sections holes in front and back is solved.

In order to solve the technical problem, the utility model provides a reaming device for dissimilar material hole, its characterized in that: the device comprises a movable handle 1, a pin 2, a spring 3, a jackscrew 4, a spiral reamer 5, a fixed handle 6, a small steel ball 9, a cutter clamping sleeve 10, a hole 11 and a supporting pin 12; pins are arranged in the radial direction of the movable handle 1 and the fixed handle 6; the rear part of the movable handle 1 is arranged in the fixed handle 6, through holes at two sides of the front part of the fixed handle are symmetrically and coaxially arranged, the central axis of the through holes is parallel to the pin, a jackscrew 4, a spring 3 and a small steel ball 9 are sequentially arranged in the through holes from outside to inside, the small steel ball corresponds to a groove on the outer circumference of the movable handle 1, and the movable handle can float up and down along the pin; the front end of the movable handle 1 is in sliding connection with the rear end of the clamping sleeve 10 through a supporting pin 12, the supporting pin is vertical to the axis of the pin 2, and the clamping sleeve 10 can float relative to the supporting pin; the helical reamer 5 is mounted on a clamping sleeve 10.

Has the advantages that: the utility model discloses an optimize the cutter structure, replace original boring mode with the handle of a knife reaming that floats, the reamer is by the helicla flute replace the straight flute to adopt carbide tool material, improve wearing and tearing, chip removal and the self-centering ability of cutter. By utilizing a metal cutting mechanism and changing geometric parameters of the reamer, a blade inclination angle of 15-20 degrees can be ground at the cutting part of the reamer, chips during reaming are guaranteed to be smoothly discharged to a chip removal groove from a front tool face, and extrusion deformation of the cut and machined surface is reduced. The cutting amount is changed, the reaming allowance is about 0.2-0.3mm generally, the boring cutter is firstly used for semi-finish machining, the reaming amount about 0.1mm is reserved for reaming, the cutter yield when a cutter bar is stressed during reaming is reduced, meanwhile, the hole position is corrected before reaming, and the position accuracy of a hole after reaming is ensured.

Drawings

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

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following description will be made in further detail with respect to the embodiments of the present invention.

The utility model provides a reaming device for dissimilar material hole, which comprises a movable handle 1, a pin 2, a spring 3, a jackscrew 4, a spiral reamer 5, a fixed handle 6, a jackpin 7, a large steel ball 8, a small steel ball 9, a cutter clamping sleeve 10, a hole 11 and a supporting pin 12;

the rear part of the movable handle 1 is arranged in the fixed handle 6 with a gap, a knock pin 7 is arranged between the rear end of the movable handle 1 and the fixed handle 6 for positioning, a big steel ball 8 is arranged in the knock pin,

the through holes on the two sides of the front part of the fixed knife handle are symmetrically and coaxially arranged, the central axis of the through holes is parallel to the pin, the through holes are sequentially provided with a jackscrew 4, a spring 3 and a small steel ball 9 from outside to inside, the small steel ball corresponds to a groove on the outer circumference of the movable handle 1 for limiting, and the movable handle can float up and down along the pin;

the front end of the movable handle 1 is in sliding connection with the rear end of the clamping sleeve 10 through a supporting pin 12, the supporting pin is vertical to the axis of the pin 2, the clamping sleeve 10 can float left and right relative to the supporting pin, and a machine tool spindle is connected with the fixed tool handle 6; the spiral reamer 5 is arranged on the clamping sleeve 10;

the inclination angle of a grinding edge of the cutting part of the reamer is 15-20 degrees, the reaming allowance is reduced, the chip removal is smooth, and no cutter back-off amount is ensured when the dissimilar materials are machined.

The reaming mode is used for replacing boring, the cutter handle in the cutter system is of a floating type, the positioning precision of the cutter is guaranteed, automatic centering machining can be achieved, deviation caused by repeated positioning precision is greatly reduced, a hole which is reamed can return to the tolerance range, all cutting edges of the reamer participate in cutting, dynamic balance of the cutter rod is guaranteed compared with single-edge boring, the cutter rod is stressed uniformly, and machining factors of materials on the aperture size in the machining process are reduced.

The integral hard alloy spiral reamer is adopted, the feeding guidance performance is good, the cooling liquid is fully poured, and the chip removal effect is good.

The parameters of a cutter are changed, a cutting edge inclination angle of 15-20 degrees is ground at the cutting part of the reamer, the cutting edge inclination angle has the function of controlling the flow direction of chips, the chips flow to the surface to be processed by a large cutting edge inclination angle and are far away from the processed surface, the reaming chips are smoothly discharged out of the hole through the reamer spiral groove, the extrusion deformation of the cutting and processed surface is reduced, and the processed hole is prevented from being scratched by the reaming chips.

Before reaming, a single-edge hard alloy fine-tuning boring cutter is used for semi-finishing, secondary processing is carried out on the reamer with the allowance of 0.1mm, the cutter bar for small allowance processing is low in stress, and the cutter bar yield is not obviously changed although the cutting performance of each part of a workpiece made of different materials is different.

The reaming is used as a main secondary hole machining mode, the positioning accuracy of the reaming determines the accuracy and quality of a machined hole to the maximum extent, the floating cutter handle is adopted for reaming, the coaxiality error between a machine tool spindle and a reamer guide sleeve is effectively offset, and the machining accuracy is further improved. The clamping tool can perform small radial X-axis and Y-axis motion compensation perpendicular to the axis, so that automatic centering machining is realized, and secondary positioning precision errors are greatly reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. A reaming device for holes of dissimilar materials, characterized in that: comprises a movable handle (1), a pin (2), a spring (3), a jackscrew (4), a spiral reamer (5), a fixed handle (6), a small steel ball (9), a cutter clamping sleeve (10), a hole (11) and a supporting pin (12); pins are arranged in the radial direction of the movable handle (1) and the fixed handle (6); the rear part of the movable handle (1) is arranged in the fixed handle (6), through holes on two sides of the front part of the fixed handle are symmetrically and coaxially arranged, the central axis of the through holes is parallel to the pin, a jackscrew (4), a spring (3) and a small steel ball (9) are sequentially arranged in the through holes from outside to inside, the small steel ball corresponds to a groove on the outer circumference of the movable handle (1), and the movable handle can float up and down along the pin; the front end of the movable handle (1) is in sliding connection with the rear end of the clamping sleeve (10) through a supporting pin (12), the supporting pin is vertical to the axis of the pin (2), and the clamping sleeve (10) can float relative to the supporting pin; the spiral reamer (5) is arranged on the clamping sleeve (10).

2. A reaming device for holes of dissimilar materials according to claim 1, characterized in that: a knock pin (7) is arranged between the rear end of the movable handle (1) and the fixed handle (6), and a large steel ball (8) is arranged in the knock pin.

3. A reaming device for holes of dissimilar materials according to claim 1, characterized in that: the main shaft of the machine tool is connected with the fixed tool handle (6).

4. A reaming device for holes of dissimilar materials according to claim 1, characterized in that: the edge inclination angle of the cutting part of the reamer is 15-20 degrees.

5. A reaming device for holes of dissimilar materials according to claim 1, characterized in that: the spiral reamer is an integral hard alloy spiral reamer.