CN211540280U

CN211540280U - Device for machining eccentric deep hole of cylindrical workpiece

Info

Publication number: CN211540280U
Application number: CN201921972466.2U
Authority: CN
Inventors: 周盈斌; 张毓; 黄鑫; 董建航
Original assignee: Xian Flight Automatic Control Research Institute of AVIC
Current assignee: Xian Flight Automatic Control Research Institute of AVIC
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-09-22
Anticipated expiration: 2029-11-14

Abstract

The utility model belongs to the BTA field relates to the eccentric BTA device of cylinder work piece. The device includes: the front clamping part comprises a guide part, a first workpiece clamping part, a first cylinder positioning hole, a guide hole, a first part clamping hole and a positioning pin hole, the rear clamping part comprises a second workpiece clamping part, a second cylinder positioning hole and a second part clamping hole, the guide hole is formed in the guide part, the first cylinder positioning hole, the second cylinder positioning hole and the positioning pin hole are reasonably arranged, the central axes of the first part clamping hole and the second part clamping hole are located below the axis of the rear clamping part, the first cylinder positioning hole and the second cylinder positioning hole are connected through the cylinder positioning rod, and eccentric deep hole machining of a cylinder workpiece is achieved. The device can coincide the eccentric hole workpiece center with the machine tool rotation center, and realizes that the eccentric hole workpiece performs rotary motion.

Description

Device for machining eccentric deep hole of cylindrical workpiece

Technical Field

The utility model belongs to the technical field of deep hole processing, concretely relates to a device for eccentric BTA of cylinder work piece.

Background

Deep hole machining plays an important role in the manufacturing industry, the hole machining accounts for one third of the total machining amount in cutting machining, the deep hole machining is one of the most expensive types in the mechanical field, the machining difficulty is high, the risk is high, the survival rate is low, the machining cost is high, and particularly the eccentric deep hole machining difficulty is higher. The cylinder work piece is by the characteristics that processing eccentric orfice center can not rotate at centre of gyration owing to not, and traditional technique adopts the mode clamping of putting the work piece in table surface and compressing tightly, and this kind of clamping mode processing result will receive the influence of three main factors: firstly, clamping errors caused by cylinder reference straightness errors; secondly, the cutter with uneven wall thickness of the eccentric hole is easy to be deviated to the processing characteristic influence of the thin part of the wall; thirdly, the cutter tool with the fixed guide sleeve center deviating from the workpiece center moves away from the starting point, and the eccentric hole center is amplified radially to generate deviation in multiples along with the increase of the depth.

SUMMERY OF THE UTILITY MODEL

Utility model purpose:

the device for machining the eccentric deep hole of the cylindrical workpiece aims to adopt the optimal technology of deep hole machining, in which the workpiece rotates, the cutter rotates and feeds, the machining is affected by the reference straightness error and the guide error of the workpiece, the machining characteristics that the cutter deflects to the wall thickness can be eliminated by utilizing the rotation of the workpiece and other factors, the machining precision is improved, the survival rate is improved, and the device for machining the eccentric deep hole of the cylindrical workpiece is provided.

The technical scheme is as follows:

in a first aspect, an apparatus for eccentric deep hole machining of a cylindrical workpiece is provided, comprising: a front clamping part, a rear clamping part, a cylindrical positioning rod 21,

wherein the front clamping part comprises a guide part 1, a first workpiece clamping part 3, a first cylindrical positioning hole 4, a guide hole 5, a first part clamping hole 6 and a positioning pin hole 8,

the guide part 1 is arranged at the front end of the front clamping part, the guide hole 5 is axially arranged in the center of the guide part 1, a first part clamping hole 6 is arranged at the rear end of the front clamping part towards the rear end, the first workpiece clamping part 3 is arranged at the rear end of the front clamping part and is positioned outside the first part clamping hole 6, a first cylindrical positioning hole 4 is arranged above the first part clamping hole 6 towards the rear end, a positioning pin hole 8 is vertically arranged at the upper end of the front clamping part upwards, and the central axis of the first part clamping hole 6 is positioned below the axis of the front clamping part;

the rear clamping part comprises a second workpiece clamping part 11, a second cylindrical positioning hole 16 and a second part clamping hole 17,

the second workpiece clamping portion 11 is disposed at the front end of the rear clamping portion and outside the second part clamping hole 17, the second cylindrical positioning hole 16 is disposed above the second part clamping hole 17 toward the front end, the second part clamping hole 17 is disposed at the front end of the rear clamping portion toward the front end, the center axis of the second part clamping hole 17 is located below the rear clamping portion axis,

one end of the cylindrical positioning rod 21 is connected to the first cylindrical positioning hole 4, and the other end of the cylindrical positioning rod 21 is connected to the second cylindrical positioning hole 16.

Optionally, the mouth of the first workpiece clamping part 3 is provided with a first tapered surface 9 and a first shrink groove 10 is provided on the first tapered surface 9.

Alternatively, the mouth portion of the second workpiece clamping portion 11 is provided with a second tapered surface 13 and a second shrinkage groove 14 is provided on the second tapered surface 13.

Optionally, the rear clamping part is further provided with a limiting table 19 at the periphery.

Optionally, a plurality of notches 20 are uniformly arranged on the limiting table 19.

Optionally, the registration pin hole 8 communicates with the first part clamping hole 6.

Optionally, a relief hole 18 communicating with the second part clamping hole 17 is provided at the rear end of the rear clamping portion.

Has the advantages that:

the device can coincide the center of the eccentric hole workpiece with the rotation center of the machine tool, realize that the eccentric hole workpiece performs rotary motion, process in an ideal cutting mode that the cutter rotates at high speed and performs feed motion, can obtain the guide for the cutter in rotation, and can lead the cutter to be concentric with the eccentric hole, thereby reducing the guide error; the workpiece is machined in rotation, so that the influence of factors such as the characteristic that a cutter deviates to a thin wall part can be eliminated, the guide precision can be improved, the workpiece is indexed, and the good effect of eccentric rotation of the workpiece is realized.

Drawings

Fig. 1 is a structural sectional view of a front clamping part.

Fig. 2 is a structural sectional view of the rear clamping portion.

Fig. 3 is an assembly structure view.

1-guide part, 2-clamping excircle, 3-workpiece clamping part, 4-cylindrical positioning hole 5-guiding hole 6-first part clamping hole 7-locking nut 8-positioning pin hole 9-first conical surface 10-first shrinkage groove 11-workpiece clamping part 12-clamping excircle 13-second conical surface 14-second shrinkage groove 15-locking nut 16-cylindrical positioning hole 17-second part clamping hole 18-lightening hole 19-limiting table 20-notch 21-cylindrical positioning rod 22-workpiece

Detailed Description

As shown in fig. 1, the component comprises a guide part 1, a clamping outer circle 2, a first workpiece clamping part 3; the center of the guide part 1 is provided with a guide hole 5, the diameter of the guide hole is the same as that of a cutter, the front end of the clamping excircle 2 is radially provided with a positioning pin hole 8 communicated with a first part clamping hole 6, the indexing is carried out by matching a cylindrical positioning pin with a pre-made indexing hole on a workpiece 22, a first cylindrical positioning hole 4 is axially arranged above the left end surface of the part, the left end of the first workpiece clamping part 3 is provided with a first conical surface 9 and six through first shrinkage grooves 10, and a first locking nut 7 is connected and locked with the first workpiece clamping part 3 through threads; as shown in figure 2, the second workpiece clamping part 11 and the clamping part 12 are designed as a whole, the right end of the second workpiece clamping part 11 is provided with a second conical surface 13 and six through second contraction grooves 14, a second lock nut 15 is locked with the second workpiece clamping part 11 through threaded connection, a second cylindrical positioning hole 16 is axially arranged above the right end surface of the clamping part 12, a second part clamping hole 17 is arranged below and communicated with a lightening hole 18 at the bottom of the hole, the front end of the outer circle of the second part clamping nut is provided with a limit platform 19 and three notches 20 are uniformly distributed, as shown in figure 3, the front part and the rear part of the device are matched, positioned and connected through cylindrical positioning rods 21 arranged in the first cylindrical positioning hole 4 and the second cylindrical positioning hole 16, the utility model is designed in a split manner, the structure is suitable for clamping workpieces with different lengths, the application range is wide, eccentric rotation of eccentric hole workpieces in the device is realized through the device, because the front part and the rear part are separated, the center of the eccentric hole of the device can be coincided with the rotation center of the machine tool only by the simultaneous action of the center of the workpiece 22 and the center of the cylindrical positioning rod 21, therefore, in the implementation, the workpiece is placed into the first part clamping hole 6 and the second part clamping hole 17 in the first step, the cylindrical positioning rod 21 is placed into the first cylindrical positioning hole 4 and the second cylindrical positioning hole 16 in the second step, the combined device is mounted on the machine tool in the third step, and the

first locking nuts

7 and 15 are clamped by a wrench in the fourth step to lock the workpiece in the device.

The aforesaid, only the utility model discloses a preferred embodiment, all foundation the utility model discloses a technique is to any simple modification that the above embodiment was done, and the equivalence changes, all falls into the utility model discloses a within the protection scope.

Claims

1. An apparatus for eccentric deep hole machining of a cylindrical workpiece, comprising: a front clamping part, a rear clamping part and a cylindrical positioning rod (21),

wherein the front clamping part comprises a guide part (1), a first workpiece clamping part (3), a first cylindrical positioning hole (4), a guide hole (5), a first part clamping hole (6) and a positioning pin hole (8),

the guide part (1) is arranged at the front end of the front clamping part, the guide hole (5) is axially arranged in the center of the guide part (1), a first part clamping hole (6) is arranged at the rear end of the front clamping part towards the rear end, the first workpiece clamping part (3) is arranged at the rear end of the front clamping part and is positioned outside the first part clamping hole (6), a first cylindrical positioning hole (4) is arranged above the first part clamping hole (6) towards the rear end, the positioning pin hole (8) is vertically upwards arranged at the upper end of the front clamping part, and the central axis of the first part clamping hole (6) is positioned below the axis of the front clamping part;

the rear clamping part comprises a second workpiece clamping part (11), a second cylindrical positioning hole (16) and a second part clamping hole (17),

the second workpiece clamping part (11) is arranged at the front end of the rear clamping part and is positioned outside a second part clamping hole (17), a second cylindrical positioning hole (16) is arranged above the second part clamping hole (17) towards the front end, the second part clamping hole (17) is arranged at the front end of the rear clamping part towards the front end, the central axis of the second part clamping hole (17) is positioned below the axis of the rear clamping part,

one end of the cylindrical positioning rod (21) is connected to the first cylindrical positioning hole (4), and the other end of the cylindrical positioning rod (21) is connected to the second cylindrical positioning hole (16).

2. Device according to claim 1, characterized in that the mouth of the first workpiece clamping part (3) is provided with a first conical surface (9) and that a first shrink groove (10) is provided on the first conical surface (9).

3. The apparatus according to claim 1, characterized in that the mouth of the second workpiece clamping section (11) is provided with a second tapered surface (13) and a second shrink groove (14) is provided on the second tapered surface (13).

4. Device according to claim 1, characterized in that the rear clamping portion is also provided with a stop (19) on its periphery.

5. The device according to claim 4, characterized in that a plurality of notches (20) are uniformly arranged on the limiting table (19).

6. The device according to claim 1, characterized in that the dowel hole (8) communicates with the first part clamping hole (6).

7. The device according to claim 1, wherein a lightening hole (18) communicating with the second part clamping hole (17) is provided at the rear end of the rear clamping portion.