CN215509277U

CN215509277U - Reamer assembly

Info

Publication number: CN215509277U
Application number: CN202022953854.5U
Authority: CN
Inventors: 孙晓阳; 唐厚继
Original assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Current assignee: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2022-01-14
Anticipated expiration: 2030-12-11

Abstract

The utility model relates to a reamer assembly, which comprises a detachable reamer head, a hollow pipe and a locking screw; the front end of the reamer head is a working end, the rear end of the reamer head is a mounting end, the mounting end is inserted into the end part of the hollow pipe, and an adjusting gap is formed between the mounting end and the end part of the hollow pipe; the end part side wall of the hollow tube is provided with a plurality of annular threaded holes which are uniformly distributed, the threaded holes are in threaded fit with locking screws, and the locking screws can be rotated to adjust the radial position of the mounting end and are in tight fit with the mounting end.

Description

Reamer assembly

Technical Field

The utility model relates to the field of machining tools, in particular to a reamer assembly.

Background

In the machining process, reaming machining is often adopted for deep hole machining with the hole diameter of about phi 18H 7-phi 40H7mm and the hole depth of about 350-500 mm. At present, the cutter bar and the cutter head of the reamer with replaceable heads are mostly matched by inner and outer conical surfaces and are screwed up by inner and outer threads, and the reamer has the advantages of high centering precision and firm connection. The disadvantages are high manufacturing cost and incapability of adjusting the eccentricity of the cutter head.

When the existing lengthened cutter is clamped, the clamping error of the hydraulic cutter handle is amplified in proportion step by step due to the fact that the cutter rod extends out for a long time, or the cutter rod deforms slightly, and the top end of the cutter rod is prone to jumping. Because of the cutter arbor is the rigid body, the tool bit passes through conical surface cooperation with the cutter arbor, also is the rigid connection, and the beating of this moment can't be rectified, can only be through the repeated clamping of cutter arbor on hydraulic handle of a knife many times, when finding reamer tool bit value of beating suitable, waste time and energy.

At present, the cutter head of the reamer with the replaceable head and the reamer bar are matched by conical surfaces, the inner thread and the outer thread are connected, and an inner cooling hole is processed on the cutter head, so that the manufacturing cost of the replaceable cutter head which is used as a consumable is higher. And when the connecting threads of the replaceable cutter head and the cutter bar are screwed down, the matching surface of the inner cone of the cutter bar is easy to be stressed and damaged to cause the cutter bar to be scrapped.

The lengthened reamer with the replaceable head adopts the clearance fit of an inner hole and an outer cylinder and is provided with a clearance of 0.01-0.015. When the dial indicator is used for measuring the bit runout of the reamer, the bit runout can be corrected by screwing the screw near the highest runout position of the dial indicator.

The cutter head mounting part of the lengthened reamer with the replaceable head is only an outer cylinder, has no matched conical surface, no inner cold hole and no connecting thread, and is simple to manufacture, low in cost and long in service life. The coolant sprayed from the nozzle of the inner cold hole on the cutter bar can only flow forward through the cutter head under the restriction of the hole wall of the inner hole of the machined part, and the requirement of cooling and lubrication is met.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the accurate positioning and the regulation of tool bit improve tool bit rigidity, quick clamping. In addition, the above problems are solved while providing cooling while processing.

The technical scheme of the utility model is as follows:

providing a reamer assembly, which comprises a detachable reamer head 1, a hollow pipe 2 and a locking screw 3; the reamer head is characterized in that the front end of the reamer head is a working end 1A, the rear end of the reamer head is a mounting end, the mounting end 1B is inserted into the end part of the hollow pipe, and an adjusting gap exists between the mounting end and the end part of the hollow pipe. The tip lateral wall of hollow tube is opened has a plurality of cyclic annular evenly arranged's screw hole 4, screw hole and locking screw thread fit, rotatory locking screw can adjust the radial position of installation end to will with installation end tight pressure fit.

Furthermore, the end part of the hollow pipe is provided with an inclined hole 5, and the inclined hole enables the inside of the hollow pipe to be communicated with the outside of the pipe wall of the end part. The cooling liquid in the hollow pipe can be sprayed to the direction of the cutter head from the inclined hole.

Further, the number of the threaded holes is at least four. Preferably 6 or 8.

Further, the number of the inclined holes is at least four. Preferably 6 or 8.

Further, the inclined hole is a through hole.

Further, an adjusting clearance of 0.01-0.015 exists between the mounting end and the end of the hollow pipe.

Further, the inclination of the inclined hole is 30-45 degrees.

Furthermore, the threaded holes are arranged in multiple rows, and each row of threaded holes are annularly and uniformly distributed.

The utility model has the advantages that: the utility model can finish the processing of deep and long holes with different apertures and high precision, reduces the cost of the cutter, can quickly respond to the requirements of different apertures in the pre-development, and has wider application prospect. The utility model can be applied to the processing of pre-ground products and parts in batches, and has certain universality and better practical value.

Drawings

FIG. 1 is a schematic view of a reamer assembly of the present invention in use;

FIG. 2 is a schematic view of a reamer assembly cutter head of the present invention;

FIG. 3 is a schematic view of the mounting of a reamer assembly of the present invention;

wherein: 1-detachable reamer head, 1A-working end, 1B-mounting end, 2-hollow tube, 3-locking screw, 4-threaded hole and 5-inclined hole.

Detailed Description

The present invention is described in further detail below.

Embodiment 1 provides a reamer assembly comprising a detachable reamer head 1, a hollow tube 2 and a locking screw 3; the front end of the reamer head is a working end 1A, the rear end of the reamer head is a mounting end, the mounting end 1B is inserted into the end part of the hollow pipe, and an adjusting gap exists between the mounting end and the end part of the hollow pipe; the tip lateral wall of hollow tube is opened has a plurality of cyclic annular evenly arranged's screw hole 4, screw hole and locking screw thread fit, rotatory locking screw can adjust the radial position of installation end to will with installation end tight pressure fit.

The end part of the hollow pipe is provided with an inclined hole 5, and the inclined hole enables the inside of the hollow pipe to be communicated with the outside of the pipe wall of the end part. The cooling liquid in the hollow pipe can be sprayed to the direction of the cutter head from the inclined hole.

The number of the threaded holes is 4.

The number of the inclined holes is at least four.

The inclined hole is a through hole.

An adjusting clearance of 0.01-0.015 exists between the mounting end and the end of the hollow pipe.

The inclination of the inclined hole is 30-45 degrees.

The threaded holes are annularly and uniformly distributed.

Claims

1. A reamer assembly characterized by: comprises a detachable reamer head (1), a hollow pipe (2) and a locking screw (3); the front end of the reamer head is a working end, the rear end of the reamer head is a mounting end, the mounting end is inserted into the end part of the hollow pipe, and an adjusting gap is formed between the mounting end and the end part of the hollow pipe; the end part side wall of the hollow tube is provided with a plurality of annular uniformly-arranged threaded holes (4), the threaded holes are in threaded fit with the locking screws, and the radial positions of the mounting ends can be adjusted by rotating the locking screws and are in press fit with the mounting ends.

2. The reamer assembly of claim 1 wherein: the end part of the hollow pipe is provided with an inclined hole (5), and the inclined hole enables the inside of the hollow pipe to be communicated with the outside of the pipe wall of the end part.

3. A reamer assembly as claimed in claim 1 or claim 2, wherein: the number of the threaded holes is at least four.

4. The reamer assembly of claim 3 wherein: the number of the threaded holes is 6 or 8.

5. The reamer assembly of claim 2 wherein: the number of the inclined holes is at least four.

6. The reamer assembly of claim 2 wherein: the inclined hole is a through hole.

7. The reamer assembly of claim 2 wherein: the inclination of the inclined hole is 30-45 degrees.

8. A reamer assembly as claimed in claim 1 or claim 2, wherein: the threaded holes are in multiple rows, and each row of threaded holes are annularly and uniformly distributed.

9. The reamer assembly of claim 5 wherein: the number of the inclined holes is 6 or 8.