CN216858434U - Combined boring machine broach fixture for processing inner grooves of ultra-long barrel - Google Patents

Abstract

The utility model relates to a combined boring machine broach harness for processing an inner groove of an ultra-long cylinder, which comprises a cutter body and a combined cutter head arranged in the cutter body, wherein the front end of the cutter body is provided with a front guiding positioning column, the rear end of the cutter body is provided with a rear guiding positioning column, the side wall of the cutter body is provided with a cutter mounting hole, the combined cutter head is mounted in the cutter mounting hole, the combined cutter head comprises a base and a blade group arranged on the base, and the blade group at least comprises a sawtooth blade and a plane blade; the utility model can gradually broaching the inner groove of the cylinder by using two blades, is particularly suitable for ultra-long and thin-walled aluminum pieces, overcomes the defects of large deformation of the aluminum pieces, uneven broaching amount, quick abrasion of a cutter and the like, and can rapidly broaching the inner groove of the aluminum cylinder.

Description

Combined boring machine broach fixture for processing inner grooves of ultra-long barrel

Technical Field

The utility model belongs to the technical field of machining, and particularly relates to a combined boring machine broach tool for machining an inner groove of an ultra-long cylinder.

Background

At present, the groove drawing on the inner hole of a box part is generally carried out on a special milling machine or a special broaching machine, the milling machine is short in groove processing length, the broaching machine can process a long groove part, but due to the influence of the equipment stroke limitation and the part shape, after the groove length exceeds a certain length, corresponding processing equipment is relatively few, and for parts with special-shaped sections, the corresponding broaching machine processing equipment is difficult to find.

As shown in figure 1, the launching tube is made of aluminum alloy, the length of the launching tube is 3000mm, an inner groove is required to be processed at the bottom, the width of the groove is 50mm, and the length of the groove is 3000 mm. Because the launching tube is long in length and thin in wall thickness, equipment and a broach tool for processing are difficult to find for processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a combined boring machine broach fixture for machining an inner groove of an ultra-long cylinder, which meets the machining requirements of ultra-long and thin-wall workpieces and solves the problem of rapid tool abrasion.

The technical scheme adopted by the utility model is as follows:

the combined boring machine broach tool for machining the inner groove of the ultra-long cylinder is characterized by comprising a tool body and a combined tool bit arranged in the tool body, wherein a front guide positioning column is arranged at the front end of the tool body, a rear guide positioning column is arranged at the rear end of the tool body, a tool mounting hole is formed in the side wall of the tool body, and the combined tool bit is mounted in the tool mounting hole.

The combined cutter head comprises a base and a plurality of blade sets arranged on the base, each blade set comprises a sawtooth blade and a plane blade, the sawtooth blades are located in front of the plane blades, cutting edges of the sawtooth blades and the plane blades are in a parallel and level state, and the height of every two adjacent blade sets is arranged in a mode that the front blade is low and the back blade is high.

Further, a cutter height adjusting jackscrew is arranged at the bottom of the cutter mounting hole, and a cutter fastening jackscrew is arranged on the side wall of the cutter height adjusting jackscrew.

Furthermore, a cutter positioning table is arranged on the inner wall of the cutter mounting hole, and a sliding groove matched with the cutter positioning table is arranged on the side wall of the base of the combined cutter head.

Further, the base comprises a front fixing plate and a rear fixing plate which are respectively arranged on the front side and the rear side of the blade group, the sliding groove is formed in the front side wall of the front fixing plate, and the front fixing plate, the blade group and the rear fixing plate are connected through fastening screws.

Furthermore, oil storage tanks are arranged on the outer side walls of the front guide positioning column and the rear guide positioning column.

Furthermore, a clamping table is arranged at the end part of the front guide positioning column, a connecting threaded hole is arranged at the axis position of the front guide positioning column, and a lightening hole is arranged on the rear guide positioning column.

The utility model has the positive effects that:

the broaching machine can be used for gradually broaching the inner groove of the cylinder body by using the two blades, is particularly suitable for ultra-long and thin-walled aluminum pieces, overcomes the defects of large deformation amount, uneven broaching machining amount, quick abrasion of a cutter and the like of the aluminum pieces, can be used for quickly broaching the inner groove of the aluminum cylinder body, and has the advantages of stable cutting, long cutting length, high dimensional precision and the like.

Drawings

FIG. 1 is a schematic view of a launch canister according to the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic view of a cutter body according to the present invention;

FIG. 5 is a schematic view of a composite cutter head of the present invention;

FIG. 6 is a schematic view of a serrated blade of the present invention;

fig. 7 is a schematic plan view of a blade of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Example 1

As shown in fig. 2-7, the present embodiment provides a combined boring machine broach fixture for machining an inner groove of an ultra-long cylinder, specifically comprising a cutter body 1 and a combined cutter head 2 disposed in the cutter body 1, wherein a cutter mounting hole 5 is formed in a side wall of the cutter body 1, the combined cutter head 2 is mounted in the cutter mounting hole 5, a front guide positioning column 3 is disposed at a front end of the cutter head 1, a rear guide positioning column 4 is disposed at a rear end of the cutter head, a clamping table 12 is disposed at an end portion of the front guide positioning column 3, a connecting threaded hole 11 is disposed at an axial center position of the front guide positioning column 3 for matching with a stud on a main shaft, and a lightening hole 9 is disposed on the rear guide positioning column 4.

Specifically, the combined cutter head 2 comprises a base and a blade group 13 mounted on the base, the blade group 13 comprises a sawtooth blade 18 and a plane blade 19, the sawtooth blade 18 is positioned in front of the plane blade 19, the cutting edges of the two blade groups are in a flush state, and the heights of the two adjacent blade groups 13 are arranged in a front-low back-high manner. The serrated blades 18 in different blade sets 13 may have the same or different tooth shapes, sizes and densities.

If only the planar blade is adopted, when a workpiece is machined, the cutting edge of the whole planar blade is in contact with the workpiece, the whole blade is subjected to large force, the cutting edge is easily damaged, and the planar blade needs to be replaced frequently. When the mode of combining the serrated blade 18 and the planar blade 19 is adopted for processing, the serrated blade 18 firstly contacts with a workpiece for processing, the contact area of the whole body and the workpiece is relatively small, the received force is small, and the workpiece is not easy to damage, and then the planar blade 19 with the cutting edge being parallel to the serrated blade 18 is used for processing the unprocessed position of the serrated blade to finish one-time broaching, so that the damage to the serrated blade 18 and the planar blade 19 is small, and the service life of the blade is effectively prolonged.

Meanwhile, by adopting the unique design that the heights of the two adjacent blade groups 13 are arranged in a front-low and rear-high manner, when machining is carried out, the whole broach harness moves along the axial direction, the first blade group 13 positioned at the forefront is firstly contacted with a workpiece to cut off a part of the workpiece, and then the second blade group 13 positioned at the rear of the broach harness is contacted with the workpiece again to further cut off a part of the workpiece, so that more workpieces can be cut off after one stroke, the reciprocating stroke required during machining is less, and the broach harness is more suitable for machining of ultra-long workpieces. For example, if the depth of the inner groove to be machined is 8mm and the depth of the single cut is 1mm, if only one set of blade sets is provided, 8 strokes are required to complete the machining. By adopting the structure of the utility model, the cutting depth of the forefront blade group is still 1mm, but the cutting edge height of the second blade group positioned at the rear part is higher than that of the front blade group, so that the second blade group can be further cut off by 1mm on the basis that the first blade group is cut off by 1mm in thickness, and thus, under the condition of being provided with two blade groups, a groove with the depth of 2mm can be cut off by a single stroke, the processing can be finished by only 4 strokes, and if the number of the blade groups is continuously increased, the reciprocating times can be further reduced.

Be equipped with oil storage tank 10 on preceding direction reference column 3 and the 4 lateral walls of back direction reference column, lubricating oil can be filled.

Example 2

The embodiment is a further improvement of the embodiment 1, in the embodiment, a cutter height adjusting jackscrew 8 is arranged at the bottom of the cutter mounting hole 5, the height of the combined cutter head 2 can be adjusted, and a cutter fastening jackscrew 7 is arranged on the side wall of the combined cutter head 2, so that the combined cutter head 2 and the side wall of the cutter mounting hole 5 can be tightly fixed.

Preferably, the inner wall of the cutter mounting hole 5 is provided with a strip-shaped cutter positioning table 6, the base is provided with a sliding groove 16 matched with the base, and the sliding groove 16 is matched with the cutter positioning table 6 to slide when the combined cutter head 2 moves up and down.

Example 3

This embodiment is a further improvement of embodiment 2, in this embodiment, the base includes a front fixing plate 14 and a rear fixing plate 15 respectively disposed at the front and rear sides of the blade group 13, the sliding slot 16 is disposed on the front side wall of the front fixing plate 14, and the front fixing plate 14, the blade group 13 and the rear fixing plate 15 are connected by a fastening screw 17.

The working principle of the utility model is as follows:

according to the width and depth of an inner groove of a part to be machined, 2-3 groups of blade groups 13 are selected, the heights of the blade groups 13 are in a step shape, the height sizes are sequentially increased from front to back, and the largest size is the size required by a workpiece. The blade group 13 is placed in the front fixing plate 14 and the rear fixing plate 15 and fastened by the fastening screw 17 to form the composite cutter head 2. The combined tool bit 2 is placed in a tool mounting hole 5 of the tool body 1, the sliding groove 16 is matched with the tool positioning table 6, the height adjusting jackscrew 8 is adjusted to be matched with the required groove drawing depth, and the tool fastening jackscrew 7 is used for fastening the combined tool bit 2 and the tool body 1 to form the combined boring machine broach harness.

And connecting the combined broaching tool of the boring machine together through the clamping table 12, the connecting threaded hole 11 and a spindle of the boring machine. When the device works, the two ends of the workpiece are fixed by the fixture, and the inner groove is positioned at the bottom and is in a horizontal state by adjusting the position of the workpiece. When the broaching machine works, the rotating speed of the spindle of the boring machine is adjusted, a workpiece is kept stable and motionless, the spindle of the boring machine drives the broaching tool to do linear motion, and broaching on the workpiece is realized under the combined action of the front guide positioning column 3, the rear guide positioning column 4 and the combined tool bit 2.

Because the heights of the blade groups 13 are in the shape of a ladder, the distance between the front and the back of the blades is 2-5 mm, when broaching, the blade with the lowest height dimension firstly broaches the workpiece, and the rear cutter gradually broaches the workpiece along with the continuous forward movement of the broach harness.

And the broach mounting tool finishes one-time broaching on the workpiece after the broach mounting tool finishes one stroke along with the main shaft. At the moment, the main shaft can be reversed, the broach fixture is retracted to the initial position, and then secondary broaching is carried out again according to the steps until the size of the inner groove of the workpiece meets the requirements of the drawing.

The utility model overcomes the defects of the prior art, provides a combined boring machine broach tool for processing an inner groove of an ultra-long cylinder, can gradually broach the inner groove of the cylinder by using two blades, is particularly suitable for ultra-long and thin-walled aluminum parts, overcomes the defects of large deformation of the aluminum parts, uneven broaching processing amount, quick tool abrasion and the like, can rapidly broach the inner groove of the aluminum cylinder, and has the advantages of stable cutting, long cutting length, high dimensional precision and the like.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A combined boring machine broach harness for processing an inner groove of an ultra-long cylinder is characterized by comprising a cutter body (1) and a combined cutter head (2) arranged in the cutter body (1), wherein the front end of the cutter body (1) is provided with a front guide positioning column (3), the rear end of the cutter body is provided with a rear guide positioning column (4), the side wall of the cutter body (1) is provided with a cutter mounting hole (5), and the combined cutter head (2) is mounted in the cutter mounting hole (5);

the combined cutter head (2) comprises a base and a plurality of blade sets (13) arranged on the base, each blade set (13) comprises a sawtooth blade (18) and a plane blade (19), the sawtooth blades (18) are located in front of the plane blade (19), the cutting edges of the sawtooth blades and the plane blade are in a parallel and level state, and the height of every two adjacent blade sets (13) is arranged in a mode that the front is low and the back is high.

2. The broach assembly of a combined boring machine for machining an inner groove of an ultra-long cylinder according to claim 1, wherein a tool height adjusting jack screw (8) is provided at the bottom of the tool mounting hole (5), and a tool fastening jack screw (7) is provided on the side wall thereof.

3. The broach assembly of the combined boring machine for machining the inner slot of the ultra-long cylinder body as claimed in claim 2, wherein the inner wall of the tool mounting hole (5) is provided with a tool positioning table (6), and the side wall of the base of the combined tool bit (2) is provided with a sliding groove (16) matched with the tool positioning table.

4. The combined boring machine broach fixture for machining an inner groove of an ultra-long cylinder body according to claim 3, characterized in that the base comprises a front fixing plate (14) and a rear fixing plate (15) which are respectively arranged at the front side and the rear side of the blade group (13), the sliding groove (16) is arranged on the front side wall of the front fixing plate (14), and the front fixing plate (14), the blade group (13) and the rear fixing plate (15) are connected through a fastening screw (17).

5. The combined broaching tool for the boring machine for the inner groove of the overlong cylinder body as claimed in claim 1, wherein the oil storage groove (10) is arranged on the outer side wall of the front guiding and positioning column (3) and the rear guiding and positioning column (4).

6. The combined broaching tool for the boring machine for the inner groove of the overlong cylinder body as claimed in claim 1, wherein the end of the front guiding and positioning column (3) is provided with a clamping table (12), the axial center of the front guiding and positioning column (3) is provided with a connecting threaded hole (11), and the rear guiding and positioning column (4) is provided with a lightening hole (9).

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