CN210648547U - Cutting tool matched with blind hole trepanning - Google Patents

Abstract

The utility model relates to a lathe work technical field, concretely relates to cutting tool of cooperation blind hole jacking. The combined cutter bar is adopted, the outer cutter bar provides power to force the cutter blade in the vertical groove of the cutter head of the inner cutter bar to feed downwards for cutting. The utility model discloses a technical scheme include uide bushing, interior cutter arbor and outer cutter arbor, on the cutter arbor of interior cutter arbor was located to outer cutter arbor cover, the push rod of outer cutter arbor stretched into the inslot of interior cutter arbor to paste the setting mutually with the inclined plane on the cutting off blade of interior cutter arbor inslot setting, on the cutter head of interior cutter arbor was located to the uide bushing cover.

Description

Cutting tool matched with blind hole trepanning

Technical Field

The utility model relates to a lathe work technical field, concretely relates to cutting tool of cooperation blind hole jacking.

Background

With the development of technologies such as aerospace, robots, new energy, precision machinery, national defense science and technology, the requirements on the performance such as precision, strength, quality, service life and stability of parts are continuously improved. With the improvement of the precision and complexity of machinery, the progress of the machinery manufacturing industry and the rapid development of the domestic heavy industry and light industry, the requirement on materials is higher and higher, and the detection on the materials is stricter and stricter. In order to test the mechanical physical and chemical properties of the cast and forged parts, a method of extracting body test bars from the body cast and forged parts and testing the body cast and forged parts is adopted to verify the properties of the body cast and forged parts.

To accomplish this, sampling tests have been performed in the past using multiple castings and forgings of a portion of the bulk material, and then cutting the portion of the material away by gas cutting. The method wastes energy and materials, cannot ensure that the mechanical, physical and chemical properties of the cast and forged pieces are really inspected, and the cut materials are in a thermal treatment state after gas cutting and have certain performance difference with the cast and forged pieces of the body, so that the test result is inaccurate. In view of this problem, the earliest improvement was to twist off the sleeved core rod to take out several pieces, but this method was not reasonable, on the one hand, it was inefficient, and on the other hand, because of the twist off required, the mechanical properties of the core rod were locally so great that the test results did not adequately reflect the properties of the bulk material.

In order to solve the problems that the test result is inaccurate and the performance of the body material cannot be fully reflected, a small-diameter blind hole core rod cutting tool is researched, the tool depends on the inclined plane at the root of the core rod, an arc-shaped blade depends on the inclined plane to enable the tip of the blade to face downwards, and the blade is enabled to feed downwards for cutting under the thrust of a cutter rod. The cutting mode can well solve the problem that most blind holes cut off the core rod. However, the tool needs a larger working space, and meanwhile, the angle of the inclined plane at the root of the mandrel needs to be ensured during trepanning processing, which undoubtedly increases the processing difficulty and reduces the processing efficiency.

At present, a blind hole cutting technology is also used, which is to radially process a workpiece after the trepanning is finished, so as to cut off a core rod. The processing mode is simple and quick. But the integrity of the workpiece is destroyed and it is difficult to use this method in a practical process.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a cooperation blind hole jacking's cutting off tool, it adopts combination formula cutter arbor, and outer cutter arbor provides power, forces the interior cutter arbor tool bit perpendicular inslot blade to feed downwards, cuts off.

For solving the problems existing in the prior art, the technical scheme of the utility model is that: the utility model provides a cooperation blind hole jacking's cutting off tool which characterized in that: the cutter comprises a guide sleeve, a cutting blade, an inner cutter rod and an outer cutter rod;

the cutting blade comprises a blade and a group of springs, one side of the top of the blade is an inclined plane, two sheets which are vertical to the blade and are different in height are respectively arranged on two side surfaces of the blade, and the two springs are respectively arranged on the lower surfaces of the two sheets;

the inner cutter rod comprises a cutter head and a first cutter rod, the cutter head is arranged at the front end of the first cutter rod, the cutter head is in a step column shape, a horizontal through groove is formed in the outer wall of an upper step along the axis direction, vertical grooves perpendicular to the horizontal through groove are formed in the two side walls of the horizontal through groove to form a cross groove, the depths of the vertical grooves are different and are matched with springs on the two sides of the cutter blade, a through hole is formed in the centers of the cutter head and the first cutter rod, the cutting-off blade is arranged in the cross groove formed by the horizontal through groove and the vertical grooves, and a guide sleeve;

outer cutter arbor include push rod and cutter arbor two, cutter arbor two be hollow column, the shape of push rod sets up the cuboid to the inclined plane for front end bottom, the inclination on inclined plane and the inclined plane at blade top cooperate, the push rod sets up in the one end of cutter arbor two, the cutter arbor two sets locate in on the cutter arbor of cutter arbor one, the push rod stretches into in the logical inslot of level of the tool bit of interior cutter arbor.

The thin slice is a circular slice.

The blade is a hand-grinding cutting blade.

Compared with the prior art, the utility model has the advantages as follows:

1. the utility model has the advantages that the working space required by the structure during working is small, the large rod core can be cut off, and the problem of cutting off the material core at the root can be solved well;

2. the utility model can automatically return to the original position after the cutting blade finishes the cutting task, thereby preventing the blade from being damaged in the process of returning the cutter;

3. the blade in the cutting blade of the utility model is a conventional cutting blade used by a lathe, and is convenient to replace;

4. the utility model has simple integral structure and convenient maintenance;

5. the utility model is provided with the guide sleeve at the working position, the guide sleeve is placed at the working position of the cutter, the guide sleeve is contacted with the hole wall and the cutter head of the inner cutter bar, the cutter is prevented from vibrating during working, and the supporting function is achieved; when the cutting blade rebounds, the phenomenon that the cutter is clamped in the hole due to the fact that the cutter is ejected out of the clamping groove due to overlarge elasticity is prevented, and the guide sleeve is arranged at the top end of the vertical groove to play a role in protection;

6. the utility model discloses can be applicable to the draw ratio and reach 50 times's deep hole.

Drawings

Fig. 1 is a schematic view of an overall three-dimensional model of the present invention;

fig. 2 is an exploded schematic view of the present invention;

FIG. 3 is a drawing of a part of the guide sleeve of the present invention;

FIG. 4 is a detail view of a blade according to the present invention;

FIG. 5 is a part view of the inner blade of the present invention;

FIG. 6 is a part view of the outer blade of the present invention;

reference numerals: the cutting tool comprises a guide sleeve 1, a cutting blade 2, an inner cutter bar 3, an outer cutter bar 4, a spring 5, a blade 6, a cutter head 7, a cutter bar I8, a cutter bar II 9 and a push rod 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a cutting tool for processing blind deep hole trepanning, which comprises four parts, namely a guide sleeve 1, a cutting blade 2, an inner cutter rod 3 and an outer cutter rod 4;

the guide sleeve 1 is in a shape of a circular tube,

the cutting blade 2 comprises a blade 6 and a group of springs 5, wherein one side of the top of the blade 6 is an inclined plane, two circular sheets which are vertical to the blade 6 and have different heights are respectively arranged on two side surfaces of the blade 6, and the two springs 5 are respectively arranged on the lower surfaces of the two circular sheets;

above-mentioned interior cutter arbor 3 includes tool bit 7 and cutter arbor 8, tool bit 7 sets up in the front end of cutter arbor 8, tool bit 7 be the step column, the outer wall of going up the step is provided with the level along the axis direction and leads to the groove, the level leads to and is provided with its vertical groove of looks vertically on the groove both sides wall and constitutes the cross recess, the degree of depth in vertical groove is inconsistent, cooperatees with the spring 5 of 6 both sides of blade, the center of tool bit 7 and cutter arbor 8 is provided with the through-hole, the size of through-hole depends on the size of material core.

The cutting blade 2 is arranged in a cross groove formed by the horizontal through groove and the longitudinal groove, and the cutter head 7 is sleeved with the guide sleeve 1;

above-mentioned outer cutter arbor 4 includes push rod 10 and two 9 of cutter arbor, two 9 of cutter arbor be hollow column, the shape of push rod 10 sets up the cuboid to the inclined plane for the front end bottom, the inclination on inclined plane and the inclined plane at 6 tops of blade cooperate, push rod 10 sets up in the one end of two 9 of cutter arbor, two 9 covers of cutter arbor are located on the cutter arbor 8 of interior cutter arbor 3, push rod 10 stretches into in the logical inslot of the level of the tool bit 7 of interior cutter arbor 3, outer cutter arbor 4 is provided with the hole that runs through at the central point, the size of hole depends on 8 sizes of cutter arbor of interior cutter arbor 3.

The utility model discloses a can solve the problem that the material core cuts off at the root well, can be suitable for and reach 50 times's deep hole with the draw ratio.

The utility model discloses a working process:

the utility model discloses a cutter adopts the rotational system of processing that feeds of cutter.

The work piece material of processing now is cast iron, and the hole diameter that needs processing is 90mm, and material core diameter is 30mm, and length is 4500mm as an example, introduces the utility model discloses system of processing's application method:

1. after the trepanning is finished, withdrawing the trepanning cutter bar;

2. placing a cutting blade 2 into a longitudinal groove of an inner cutter bar 3, placing a guide sleeve 1 on a semicircle of the inner cutter bar 3, sleeving an outer cutter bar 4 on the inner cutter bar 3, and extending a push rod 10 on the outer cutter bar 4 into a transverse groove of the inner cutter bar 3;

3. feeding a cutter into the hole;

4. the cutter integrally rotates and comprises an inner cutter rod 3 and an outer cutter rod 4,

5. feeding the outer cutter bar 4;

6. the processing parameters are that the rotating speed is 30 revolutions per minute, and the feeding speed is 0.1mm per revolution;

7. a push rod 10 on the outer cutter bar 4 is contacted with the blade 6, and the blade 6 is forced to feed downwards by the inclined surface of the push rod 10 to start cutting;

8. after the cutting is completed, the rotation is stopped, and the outer blade lever 4 is retracted to the original position. The blade 6 automatically rebounds to the original position by the pressure of the spring 5;

9. and (5) withdrawing the cutting tool from the inner hole to finish cutting.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (3)

1. The utility model provides a cooperation blind hole jacking's cutting off tool which characterized in that: the cutter comprises a guide sleeve (1), a cutting blade (2), an inner cutter bar (3) and an outer cutter bar (4);

the cutting blade (2) comprises a blade (6) and a group of springs (5), one side of the top of the blade (6) is an inclined plane, two sheets which are vertical to the blade (6) and have different heights are respectively arranged on two side faces of the blade (6), and the two springs (5) are respectively arranged on the lower surfaces of the two sheets;

the inner cutter bar (3) comprises a cutter head (7) and a first cutter bar (8), the cutter head (7) is arranged at the front end of the first cutter bar (8), the cutter head (7) is in a step column shape, a horizontal through groove is formed in the outer wall of an upper step along the axis direction, vertical grooves perpendicular to the cutter head are formed in the two side walls of the horizontal through groove to form cross grooves, the depths of the vertical grooves are different, the vertical grooves are matched with springs (5) on the two sides of a blade (6), through holes are formed in the centers of the cutter head (7) and the first cutter bar (8), the cutting blade (2) is arranged in the cross grooves formed by the horizontal through groove and the vertical grooves, and a guide sleeve (1) is sleeved on the cutter head (7;

outer cutter arbor (4) include push rod (10) and cutter arbor two (9), cutter arbor two (9) be hollow column, the shape of push rod (10) sets up the cuboid into the inclined plane for the front end bottom, the inclination on inclined plane and the inclined plane at blade (6) top cooperate, push rod (10) set up in the one end of cutter arbor two (9), cutter arbor two (9) cover are located on cutter arbor (8) of interior cutter arbor (3), push rod (10) stretch into in the logical inslot of level of tool bit (7) of interior cutter arbor (3).

2. The cutting tool matched with the blind hole trepanning material according to claim 1, wherein: the thin slice is a circular slice.

3. The cutting tool for the blind hole trepanning matching according to claim 1 or 2, wherein: the blade (6) is a hand-grinding cutting blade.

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