CN223198122U - Milling cutter composite set - Google Patents

Abstract

The utility model discloses a milling cutter assembly device, comprising: a milling cutter disc, a mounting hole being provided at its lower end, a plurality of blades being welded to the lower end face of the milling cutter disc; a centering shaft, a positioning thread being provided at its lower end to match the threaded hole of a workpiece; a bushing; the bushing being mounted on the centering shaft, the mounting hole of the milling cutter disc being matched with the outer circle of the bushing for mounting. In this solution, the coaxiality of the milling cutter disc and the centering shaft is ensured by the tolerance matching relationship among the centering shaft, the bushing and the milling cutter disc, and the coaxiality of the center of the milling cutter disc and the threaded hole of the workpiece is ensured by the positioning thread of the centering shaft matching with the threaded hole of the workpiece. Therefore, when milling the end face of the threaded hole of the workpiece, the consistency between the machining datum and the assembly datum is achieved, and the verticality of the end face of the threaded hole is ensured.

Description

Milling cutter composite set

Technical Field

The utility model relates to the field of machining tools, in particular to a milling cutter combination device.

Background

The screw thread oilhole is passed through hollow joint bolt and is connected with oil pipe to the gear box business turn over, realizes the circulation of the interior hydraulic oil of gear box, and during the installation, oil pipe connects installs the red copper packing ring additional between terminal surface and the box screw hole terminal surface, prevents the oil leak. In order to ensure the oil sealing effect, the flatness and verticality of the end face of the threaded oil hole are generally required by high process technology. At present, the processing technology of the screw thread oil hole in and out of the gearbox body comprises the steps of drilling a screw thread bottom hole, countersinking an end face and tapping, wherein the countersinking end face is usually processed by a countersink on a rocker arm drilling machine.

The purpose of spot facing is to spot-facing the end face of the orifice and to ensure that the end face of the orifice is perpendicular to the center line of the orifice, so that the end face of the connecting bolt or nut can be kept in good contact with the connecting piece. In order to ensure the perpendicularity of the end face of the orifice and the center line of the hole, the counter bit uses a guide post as a guide in the processing process, but the end face of the threaded hole is processed, a guide positioning hole is a threaded bottom hole, and in the mounting and using process of an actual stud, the determination factor of the sealing performance is the perpendicularity of the threads and the end face of the hole, and the perpendicularity of the threaded hole and the end face cannot be completely ensured in the current processing mode due to the influence of factors such as non-unification of a processing reference and a mounting reference.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide the milling cutter combined device, which not only can ensure the perpendicularity between a threaded hole of a gear box body and an end surface, but also can meet the requirements of easy use and easy replacement of the device, can realize rapid combined assembly, and can adapt to the part processing of different product types and specifications.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

A milling cutter assembly, comprising:

The lower end of the milling cutter disc is provided with a mounting hole, and a plurality of blades are welded at the end face of the lower end of the milling cutter disc;

The lower end of the centering shaft is provided with positioning threads matched with the threaded holes of the workpieces;

A bushing;

The bush is installed on the centering shaft, and the mounting hole of milling cutter dish and the excircle of bush are installed in the cooperation.

Preferably, the centering shaft comprises a first shaft body, a second shaft body and a third shaft body which are coaxially arranged, the outer diameters of the first shaft body, the second shaft body and the third shaft body are sequentially reduced, the first shaft body is arranged at the lower end of the second shaft body, the third shaft body is arranged at the upper end of the second shaft body, the positioning threads are arranged on the first shaft body, the inner diameter of the inner hole of the centering shaft is smaller than the outer diameter of the first shaft body, and the inner diameter of the inner hole of the centering shaft is larger than the outer diameter of the second shaft body.

Preferably, the centering shaft is integrally formed by adopting round steel.

Preferably, the outer diameter of the first shaft body is greater than the inner diameter of the mounting hole in the milling cutter disc.

Preferably, the sum of the lengths of the second shaft body and the third shaft body is not greater than the depth of the mounting hole in the milling cutter disc.

Preferably, the lining is integrally formed by adopting round steel materials, and an inner hole and an outer circle of the lining are coaxially arranged.

Preferably, the outer circle of the centering shaft is in clearance fit with the inner hole of the bushing.

Preferably, the mounting hole of the milling cutter disc is in clearance fit with the outer circle of the bushing.

Preferably, the upper end of the milling cutter disc is provided with an interface, the interface and the mounting hole are coaxially arranged, and the interface is used for being matched and connected with a pneumatic wrench or an electric wrench.

The utility model has the following beneficial effects due to the adoption of the technical scheme:

1. According to the utility model, through the tolerance matching relation of the centering shaft, the bushing and the milling cutter disc, the coaxiality of the milling cutter disc and the centering shaft is ensured, and the coaxiality of the center of the milling cutter disc and the threaded hole of the workpiece is ensured through the matching of the positioning thread of the centering shaft and the threaded hole of the workpiece, so that the consistency of a processing reference and an assembly reference is achieved when the end surface of the threaded hole of the workpiece is milled, and the perpendicularity of the end surface of the threaded hole is ensured;

2. the utility model can directly use the pneumatic spanner or the electric spanner to drive without depending on the processing equipment such as a machine tool and the like, thereby providing great convenience for processing, particularly avoiding the trouble of disassembling parts under the conditions of maintenance and the like, improving the working efficiency, saving the processing cost and providing a quick response method for the processing and the maintenance of the parts;

3. In the utility model, the bushing is in clearance fit with the centering shaft, and the bushing is in clearance fit with the milling cutter disc, so that the bushing is easy to install and replace on the premise of ensuring the precision;

4. In the utility model, the bushing is arranged to move the abrasion consumption during processing from the centering shaft to the bushing, the service life of the utility model is prolonged by changing the bushing, and the processing cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is a schematic structural view of a mandrel;

FIG. 4 is a schematic structural view of a milling cutter head;

Fig. 5 is a schematic diagram of the milling cutter assembly device in use for spot facing.

Reference numerals:

100. 101, a workpiece, a threaded hole;

1. Milling cutter disc 11, mounting hole 12, blade 13, interface;

2. Centering shaft, 21, first shaft body, 22, second shaft body, 23, third shaft body, 211, positioning screw thread;

3. a bushing.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For convenience of description, in the present utility model, when the milling cutter assembly is used, a side close to the workpiece 100 is lower, and vice versa.

As shown in fig. 1 to 5, the present utility model discloses a milling cutter assembly, comprising:

The lower end of the milling cutter disc 1 is provided with a mounting hole 11, a plurality of blades 12 are welded at the end face of the lower end of the milling cutter disc 1, generally, the number of the blades 12 is 3,3 positions for welding the blades are firstly milled at the end face of the lower end of the milling cutter disc 1, and then the blades 12 are welded on the milling cutter disc 1;

a centering shaft 2, the lower end of which is provided with positioning threads 211 which are matched with the threaded holes 101 of the workpiece 100;

a bushing 3;

The bush 3 is arranged on the centering shaft 2, and the mounting hole 11 of the milling cutter disc 1 is matched with the outer circle of the bush 3.

In the utility model, the coaxiality of the milling cutter disc 1 and the centering shaft 2 is ensured through the tolerance matching relationship of the centering shaft 2, the bushing 3 and the milling cutter disc 1, and the coaxiality of the center of the milling cutter disc 1 and the threaded hole 101 of the workpiece 100 is ensured through the matching of the positioning thread 211 of the centering shaft 2 and the threaded hole 101 of the workpiece 100, so that the consistency of a processing reference and an assembly reference is achieved when the end face of the threaded hole 101 of the workpiece 100 is milled, and the perpendicularity of the end face of the threaded hole 101 is ensured.

In order to meet the requirement that the milling cutter combination device is easy to use and replace, the outer circle of the centering shaft 2 and the inner hole of the bushing 3 are in clearance fit, the mounting hole 11 of the milling cutter disc 1 is in clearance fit with the outer circle of the bushing 3, the matching dimensional tolerance of the bushing 3, the centering shaft 2 and the milling cutter disc 1 is reasonably designed, and the bushing 3 is easy to install and replace on the premise of ensuring the precision.

In the utility model, the bushing 3 is arranged to move the abrasion consumption during processing from the centering shaft 2 to the bushing 3, the service life of the utility model is prolonged by changing the bushing 3, and the processing cost is reduced, and meanwhile, the bushing 3 can be matched with different centering shafts 2, so that the overall investment of tooling manufacturing can be reduced, the economy is ensured, the management can be simplified, and the management cost is reduced.

In order to facilitate the driving of the milling cutter disc for milling, in the utility model, the upper end of the milling cutter disc 1 is provided with an interface 13, the interface 13 is coaxially arranged with the mounting hole 11, and the interface 13 is used for being matched and connected with a pneumatic wrench or an electric wrench, so that the milling cutter disc 1 is directly driven by the pneumatic wrench or the electric wrench without using machining equipment such as a machine tool, thereby facilitating the machining, greatly improving the machining efficiency, being particularly suitable for portable operation in the occasions of complete machine repair, after-sale maintenance and the like, and omitting a lot of disassembly work. Generally, the interface 13 is rectangular in configuration.

In the present utility model, the centering shaft 2 includes a first shaft body 21, a second shaft body 22 and a third shaft body 23 coaxially disposed, the outer diameters of the first shaft body 21, the second shaft body 22 and the third shaft body 23 are sequentially reduced, the first shaft body 21 is disposed at the lower end of the second shaft body 22, the third shaft body 23 is disposed at the upper end of the second shaft body 22, the positioning thread 211 is disposed on the first shaft body 21, the inner diameter of the inner hole of the centering shaft 2 is smaller than the outer diameter of the first shaft body 21, and the inner diameter of the inner hole of the centering shaft 2 is larger than the outer diameter of the second shaft body 22.

The centering shaft 2 is integrally formed by adopting round steel on a numerical control lathe, so that the overall coaxiality of the centering shaft 2 is ensured.

In this scheme, the external diameter of first axis body 21 is greater than the internal diameter of mounting hole 11 on milling cutter dish 1, and in this way, when milling cutter dish 1, centering shaft 2 and bush 3 are assembled together, the first axis body 21 of centering shaft 2 exposes outside milling cutter dish 1 all the time, and the convenience is when using, installs the screw thread 211 of the location of first axis body 21 with the screw hole 101 cooperation of work piece 100.

More preferably, the sum of the lengths of the second shaft body 22 and the third shaft body 23 is not greater than the depth of the mounting hole 11 on the milling cutter disc 1, so as to prevent the milling cutter disc 1 from being lowered to the stroke limit without cutting the end surface of the threaded hole in place during spot facing.

According to the utility model, the lining 3 is integrally formed by adopting a round steel material, and the inner hole and the outer circle of the lining 3 are coaxially arranged, so that the coaxiality of the inside and the outside of the lining 3 is ensured.

When the milling cutter combined device is used, the specific steps are as follows:

1. Selecting a proper centering shaft 2 according to the specification of the threaded aperture of the processed part;

2. The bushing 3 is arranged on the centering shaft 2, and the milling cutter disc 1 is sleeved outside the bushing 3 to form a milling cutter combination device;

3. The positioning thread 211 of the first shaft body 21 on the centering shaft 2 of the milling cutter combination device is screwed into the threaded hole 101 of the workpiece 100 to perform processing positioning, and the milling cutter disc 1 and the threaded hole 101 of the workpiece 100 are in a coaxial state due to the matching relationship;

4. The milling cutter disc 1 is driven by an air wrench or an electric wrench to cut the end surface of the screw hole 101 of the workpiece 100.

All features described in the description, the appended claims and the drawings, either alone or in any combination, are important features of the present utility model.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, variations, deletions of parts, additions of features, or re-combination of features may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, all such simple modifications, equivalents, and adaptations of the embodiments as may be made by the principles of the utility model and without departing from the scope of the utility model.

Claims (9)

1. A milling cutter assembly, comprising:

the lower end of the milling cutter disc (1) is provided with a mounting hole (11), and a plurality of blades (12) are welded at the end face of the lower end of the milling cutter disc (1);

A centering shaft (2), the lower end of which is provided with a positioning thread (211) which is matched with the threaded hole (101) of the workpiece (100);

A bushing (3);

The bushing (3) is arranged on the centering shaft (2), and the mounting hole (11) of the milling cutter disc (1) is matched with the outer circle of the bushing (3).

2. The milling cutter assembly device according to claim 1, wherein the centering shaft (2) comprises a first shaft body (21), a second shaft body (22) and a third shaft body (23) which are coaxially arranged, the outer diameters of the first shaft body (21), the second shaft body (22) and the third shaft body (23) are sequentially reduced, the first shaft body (21) is arranged at the lower end of the second shaft body (22), the third shaft body (23) is arranged at the upper end of the second shaft body (22), the positioning thread (211) is arranged on the first shaft body (21), the inner diameter of the inner hole of the centering shaft (2) is smaller than the outer diameter of the first shaft body (21), and the inner diameter of the inner hole of the centering shaft (2) is larger than the outer diameter of the second shaft body (22).

3. A milling cutter assembly according to claim 2, wherein the centering shaft (2) is integrally formed from round steel.

4. A milling cutter assembly according to claim 2, wherein the outer diameter of the first shaft body (21) is larger than the inner diameter of the mounting hole (11) in the milling cutter head (1).

5. A milling cutter assembly according to claim 2, wherein the sum of the lengths of the second shaft body (22) and the third shaft body (23) is not greater than the depth of the mounting hole (11) in the milling cutter head (1).

6. The milling cutter assembly according to claim 1, wherein the bushing (3) is integrally formed from round steel, and the inner bore of the bushing (3) is coaxially arranged with the outer circle.

7. A milling cutter assembly according to claim 1, characterized in that the outer circumference of the centering shaft (2) is in a clearance fit with the inner bore of the bushing (3).

8. A milling cutter assembly according to claim 1, characterized in that the mounting hole (11) of the milling cutter disc (1) is in a clearance fit with the outer circumference of the bushing (3).

9. The milling cutter assembly according to claim 1, wherein the upper end of the milling cutter disc (1) is provided with an interface (13), the interface (13) is coaxially arranged with the mounting hole (11), and the interface (13) is used for being matched and connected with a pneumatic wrench or an electric wrench.