阅读说明：本技术 一种组合拉刀 (Combined broach ) 是由 谢龙德 雷子勤 马洪强 罗捷 雷永志 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种组合拉刀,包括拉刀刀体(1),所述拉刀刀体(1)包括拉头段(11)、拉削段(12)以及倒角段(13)；所述拉削段(12)用于对待加工件的内孔表面进行拉削形成键槽；所述拉刀刀体(1)的宽度大于键槽的宽度；所述倒角段(13)上嵌设有倒角块(2)并通过连接结构进行固定；所述拉头段(11)的外侧端的相对的两侧面上开设有安装槽(111)；所述拉削段(12)上设有若干呈均匀排列的拉削齿(121)。本发明具有提高加工效率和降低生产成本的优点。(The invention discloses a combined broach, which comprises a broach body (1), wherein the broach body (1) comprises a broach head section (11), a broaching section (12) and a chamfering section (13); the broaching section (12) is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body (1) is larger than that of the key groove; the chamfering block (2) is embedded in the chamfering section (13) and is fixed through a connecting structure; mounting grooves (111) are formed in two opposite side faces of the outer side end of the pull head section (11); the broaching section (12) is provided with a plurality of broaching teeth (121) which are uniformly arranged. The invention has the advantages of improving the processing efficiency and reducing the production cost.)

1. A combination broach, comprising:

the broach comprises a broach body (1), wherein the broach body (1) comprises a broach head section (11), a broaching section (12) and a chamfering section (13); the broaching section (12) is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body (1) is larger than that of the key groove; and the chamfer section (13) is embedded with a chamfer block (2) and is fixed through a connecting structure.

2. The combination broach according to claim 1, wherein: mounting grooves (111) are formed in two opposite side faces of the outer side end of the pull head section (11).

3. The combination broach according to claim 1, wherein: the broaching section (12) is provided with a plurality of broaching teeth (121) which are uniformly arranged.

4. The combination broach according to claim 1, wherein: a fixing groove (131) is formed in the chamfering section (13), and the chamfering block (2) is installed in the fixing groove (131).

5. The combination broach according to claim 4, wherein: the fixing structure is a locking screw (3), and the locking screw (3) penetrates through the chamfering section (13) and is screwed in the chamfering block (2).

6. The combination broach according to claim 1, wherein: the chamfering machine is characterized in that a plurality of protruding blocks (21) which are uniformly arranged are arranged on the chamfering block (2), chamfering grooves which are obliquely arranged are formed in the protruding blocks (21), and chamfering teeth (22) are embedded in the chamfering grooves.

Technical Field

The invention relates to the field of machining, in particular to a combined broach.

Background

The keyway broach is the instrument that is used for broaching the keyway, and the keyway of semicircle keyway and flat key all is suitable for, and the broaching surplus is big, and the number of teeth is many, and broaching surface roughness is great. The sizes and the limit deviations of the key grooves of the semicircular key groove and the flat key are the same, and the key groove broach can be used universally. The wedge key is 0.5-1.3 mm shallower than the flat key groove, and when the wedge key is drawn into the wedge key groove by a standard key groove broach once, the groove depth of the guide sleeve needs to be increased. When the thickness of the gasket is drawn for multiple times (b is more than or equal to 14 mm), the thickness of the gasket is recalculated. The thin flat key is shallower than the flat key slot (0.9-3.5 mm), and the groove depth of the guide sleeve should be determined according to the guide sleeve size a during one-time drawing. If not, a special broach should be made. When the material is drawn for multiple times, the thickness of the gasket is selected to be proper.

The inner hole key groove is usually machined on a broaching machine in a broaching tool broaching mode, and after broaching, chamfering and deburring are needed to be carried out on two ends of the key groove so as to avoid influencing assembly and use; referring to national standard GB/T14329-.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a combined broach.

The purpose of the invention is realized by the following technical scheme:

a combination broach, comprising:

the broach comprises a broach body and a broach body, wherein the broach body comprises a broach head section, a broaching section and a chamfering section; the broaching section is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body is larger than that of the key groove; and the chamfering block is embedded in the chamfering section and is fixed through a connecting structure.

Furthermore, the two opposite side surfaces of the outer side end of the pull head section are provided with mounting grooves.

Furthermore, a plurality of broaching teeth which are uniformly arranged are arranged on the broaching section.

Furthermore, a fixing groove is formed in the chamfering section, and the chamfering block is installed in the fixing groove.

Furthermore, the fixing structure is a locking screw which penetrates through the chamfering section and is screwed in the chamfering block.

Furthermore, a plurality of protruding blocks which are uniformly arranged are arranged on the chamfering block, chamfering grooves which are obliquely arranged are formed in the protruding blocks, and chamfering teeth are embedded in the chamfering grooves.

The invention has the beneficial effects that:

according to the combined broach, the broach body is widened and changed into the wide broach body, and the widths of the broach bodies with the same specification and different tolerances are unified into one size, so that the same guide sleeve can be used for processing workpieces with the same aperture, the same key width and different tolerances, and the tooling cost is saved; the chamfering block is embedded on the chamfering section, chamfering teeth are arranged on the chamfering block, the chamfering block is in a modular design and is fixed on a broach body by screws, so that the chamfering block is convenient to disassemble and can be repeatedly used, the broach can process workpieces with the same key width and different key depths by adding gaskets or replacing chamfering blocks with different heights, and the deep key and the shallow key can be processed and chamfered by the same broach, so that the practicability of the broach is improved; the chamfer teeth on the broach are made of hard alloy materials, so that the broach is good in wear resistance and not prone to generating reverse burrs.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a bottom view of the present invention;

FIG. 4 is a front view of the body of the broach;

FIG. 5 is a schematic structural view of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 1;

fig. 7 is an enlarged view at B in fig. 1.

In the figure, 1-broach cutter body, 11-broach head section, 12-broaching section, 13-chamfering section, 2-chamfering block, 111-mounting groove, 121-broaching tooth, 122-broaching groove, 131-fixing groove, 3-locking screw, 21-convex block and 22-chamfering tooth.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

First embodiment, in the present embodiment, as shown in fig. 1 to 7, a combined broach comprises a broach body 1, where the broach body 1 includes a broach head section 11, a broaching section 12 and a chamfer section 13; the broaching section 12 is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body 1 is larger than that of the key groove; the chamfering block 2 is embedded in the chamfering section 13 and is fixed through a connecting structure; the broach cutter body 1 is rectangular and long in shape as a whole, and the edges of the broach cutter body are chamfered edges.

In this embodiment, the broach body 1 is an integrally formed structure, the length of the broaching section 12 is greater than that of the broaching section 11, and the length of the broaching section 11 is greater than that of the chamfering section 13; widening the broach body 1, uniformly changing the broach body into a broach with a wide broach body, and uniformly changing the widths of the broach bodies with the same specification and different tolerances into one size; when the inner hole key groove width is 16+0.12/+0.05mm, 16 +/-0.021 mm and 16-0.018/-0.061mm, the width of the broach body 1 is 20mm, so that the same guide sleeve can be used for processing workpieces with the same aperture, the same key width and different tolerances, and the tooling cost is saved; through the embedding of chamfer piece 2 establish for be convenient for change the chamfer piece 2 of different models.

The embodiment is further configured as follows: and two opposite side surfaces of the outer side end of the pull head section 11 are provided with mounting grooves 111.

In this embodiment, the mounting groove is a rectangular groove, the mounting groove 111 is used in cooperation with a broaching machine, and the broach body 1 is fixed to the broaching machine through the mounting groove 111 on the broach head section 11.

The embodiment is further configured as follows: a plurality of broaching teeth 121 which are uniformly arranged are arranged on the broaching section 12.

In this embodiment, the plurality of broaching teeth 121 and the broaching section 12 are integrally formed, and the upper ends of the broaching teeth 121 form an acute angle and an obtuse angle, the acute angle faces the direction of the broaching section 11, and the obtuse angle faces the direction of the chamfering section 13; a broaching groove 122 is formed between two adjacent broaching teeth 121; the broaching teeth 121 are used for broaching the surface of the inner hole of the workpiece to form a key groove.

The embodiment is further configured as follows: a fixing groove 131 is formed in the chamfering section 13, and the chamfering block 2 is installed in the fixing groove 131.

In this embodiment, the whole strip form that is of fixed slot 131, the width direction of fixed slot 131 runs through the outside that extends to broach cutter body 1 for be convenient for insert chamfer piece 2 from the side of fixed slot 131, fixed slot 131 length direction's bottom both ends are the arcwall face, chamfer piece 2's bottom both ends also are the arc structure, the arcwall face suits with the arc structure.

The embodiment is further configured as follows: the fixing structure is a locking screw 3, and the locking screw 3 penetrates through the chamfering section 13 and is screwed in the chamfering block 2.

In this embodiment, a countersunk hole is formed in the bottom of the chamfer section 13, the countersunk hole extends into the fixing groove 131, a threaded hole is formed in the chamfer block 2, and the locking screw 3 is matched with the countersunk hole and the threaded hole for use.

The embodiment is further configured as follows: the chamfering block 2 is provided with a plurality of protruding blocks 21 which are uniformly arranged, the protruding blocks 21 are provided with chamfering grooves which are obliquely arranged, and chamfering teeth 22 are embedded in the chamfering grooves.

In this embodiment, the chamfer tooth 22 is made of alloy, the whole chamfer tooth 22 is inclined towards the broaching tooth 121, the height of the outer surface of the protruding block 21 is lower than that of the chamfer tooth 22, and the height of the outer surface of the chamfer tooth 22 is lower than that of the outer surface of the broaching tooth 121; the chamfer teeth 22 are used for chamfering and deburring both ends of the pulled-out key groove.

The second embodiment discloses a combined broach, which comprises a broach body 1, wherein the broach body 1 comprises a broach head section 11, a broaching section 12 and a chamfering section 13; the broaching section 12 is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body 1 is larger than that of the key groove; the chamfering block 2 is embedded in the chamfering section 13 and is fixed through a connecting structure; the broach cutter body 1 is rectangular and long in shape as a whole, and the edges of the broach cutter body are chamfered edges.

In this embodiment, the length of the broaching section 12 is greater than that of the broaching section 11, and the length of the broaching section 11 is greater than that of the chamfering section 13; widening the broach body 1, uniformly changing the broach body into a broach with a wide broach body, and uniformly changing the widths of the broach bodies with the same specification and different tolerances into one size; when the inner hole key groove width is 16+0.12/+0.05mm, 16 +/-0.021 mm and 16-0.018/-0.061mm, the width of the broach body 1 is 20mm, so that the same guide sleeve can be used for processing workpieces with the same aperture, the same key width and different tolerances, and the tooling cost is saved; through the embedding of chamfer piece 2 establish for be convenient for change the chamfer piece 2 of different models.

In this embodiment, the pull head section 11, the broaching section 12 and the chamfering section 13 are fixedly connected by a connecting member.

The embodiment is further configured as follows: and two opposite side surfaces of the outer side end of the pull head section 11 are provided with mounting grooves 111.

In this embodiment, the mounting groove is a trapezoidal groove, the mounting groove 111 is used in cooperation with a broaching machine, and the broach body 1 is fixed to the broaching machine through the mounting groove 111 on the broaching head section 11.

The embodiment is further configured as follows: a plurality of broaching teeth 121 which are uniformly arranged are arranged on the broaching section 12.

In this embodiment, the broaching section 12 is fixed with a broaching block by bolts, the broaching teeth 121 are located on the broaching block, and the upper ends of the broaching teeth 121 form an acute angle and an obtuse angle, the acute angle end faces towards the direction of the broaching head section 11, and the obtuse angle end faces towards the direction of the chamfering section 13; a broaching groove 122 is formed between two adjacent broaching teeth 121.

The embodiment is further configured as follows: a fixing groove 131 is formed in the chamfering section 13, and the chamfering block 2 is installed in the fixing groove 131.

In this embodiment, the whole strip form that is of fixed slot 131, the width direction of fixed slot 131 runs through the outside that extends to broach cutter body 1 for be convenient for insert chamfer piece 2 from the side of fixed slot 131, fixed slot 131 length direction's bottom both ends are the arcwall face, chamfer piece 2's bottom both ends also are the arc structure, the arcwall face suits with the arc structure.

The embodiment is further configured as follows: the fixing structure is a locking screw 3, and the locking screw 3 penetrates through the chamfering section 13 and is screwed in the chamfering block 2.

In this embodiment, a countersunk hole is formed in the bottom of the chamfer section 13, the countersunk hole extends into the fixing groove 131, a threaded hole is formed in the chamfer block 2, and the locking screw 3 is matched with the countersunk hole and the threaded hole for use.

The embodiment is further configured as follows: the chamfering block 2 is provided with a plurality of protruding blocks 21 which are uniformly arranged, the protruding blocks 21 are provided with chamfering grooves which are obliquely arranged, and chamfering teeth 22 are embedded in the chamfering grooves.

In this embodiment, the chamfer tooth 22 is made of alloy, the whole chamfer tooth 22 is inclined towards the broaching tooth 121, the height of the outer surface of the protruding block 21 is lower than that of the chamfer tooth 22, and the height of the outer surface of the chamfer tooth 22 is lower than that of the outer surface of the broaching tooth 121.

The third embodiment discloses a combined broach, which comprises a broach body 1, wherein the broach body 1 comprises a broach head section 11, a broaching section 12 and a chamfering section 13; the broaching section 12 is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body 1 is larger than that of the key groove; the chamfering block 2 is embedded in the chamfering section 13 and is fixed through a connecting structure; the broach cutter body 1 is rectangular and long in shape as a whole, and the edges of the broach cutter body are chamfered edges.

In this embodiment, the broach body 1 is an integrally formed structure, the length of the broaching section 12 is greater than that of the broaching section 11, and the length of the broaching section 11 is greater than that of the chamfering section 13; widening the broach body 1, uniformly changing the broach body into a broach with a wide broach body, and uniformly changing the widths of the broach bodies with the same specification and different tolerances into one size; when the inner hole key groove width is 16+0.12/+0.05mm, 16 +/-0.021 mm and 16-0.018/-0.061mm, the width of the broach body 1 is 20mm, so that the same guide sleeve can be used for processing workpieces with the same aperture, the same key width and different tolerances, and the tooling cost is saved; through the embedding of chamfer piece 2 establish for be convenient for change the chamfer piece 2 of different models.

The embodiment is further configured as follows: and two opposite side surfaces of the outer side end of the pull head section 11 are provided with mounting grooves 111.

In this embodiment, the mounting groove is an arc-shaped groove, the mounting groove 111 is used in cooperation with a broaching machine, and the broach body 1 is fixed to the broaching machine through the mounting groove 111 on the broaching head section 11.

The embodiment is further configured as follows: a plurality of broaching teeth 121 which are uniformly arranged are arranged on the broaching section 12.

In this embodiment, the plurality of broaching teeth 121 and the broaching section 12 are integrally formed, and the upper ends of the broaching teeth 121 form an acute angle and an obtuse angle, the acute angle faces the direction of the broaching section 11, and the obtuse angle faces the direction of the chamfering section 13; a broaching groove 122 is formed between two adjacent broaching teeth 121.

The embodiment is further configured as follows: a fixing groove 131 is formed in the chamfering section 13, and the chamfering block 2 is installed in the fixing groove 131.

In this embodiment, the whole fixed slot 131 is a strip, the width direction of the fixed slot 131 runs through and extends to the outside of the broach cutter body 1, so that the chamfering block 2 is conveniently inserted from the side surface of the fixed slot 131, the two ends of the bottom in the length direction of the fixed slot 131 are inclined planes, the two ends of the bottom of the chamfering block 2 are also in an inclined plane structure, and the inclined planes are adapted to the inclined plane structure.

The embodiment is further configured as follows: the fixed knot constructs for the pin, the pin runs through chamfer section 13 and chamfer piece.

In this embodiment, a through hole has been seted up to the bottom of chamfer section 13, in the through hole extends to fixed slot 131, the round hole has been seted up on chamfer piece 2, the pin cooperatees with through hole and round hole and uses.

The embodiment is further configured as follows: the chamfering block 2 is provided with a plurality of protruding blocks 21 which are uniformly arranged, the protruding blocks 21 are provided with chamfering grooves which are obliquely arranged, and chamfering teeth 22 are embedded in the chamfering grooves.

In this embodiment, the chamfer tooth 22 is made of alloy, the whole chamfer tooth 22 is inclined towards the broaching tooth 121, the height of the outer surface of the protruding block 21 is lower than that of the chamfer tooth 22, and the height of the outer surface of the chamfer tooth 22 is lower than that of the outer surface of the broaching tooth 121; the chamfer teeth 22 are fixed in the chamfer grooves through pins and glue.

The fourth embodiment discloses a combined broach, which comprises a broach body 1, wherein the broach body 1 comprises a broach head section 11, a broaching section 12 and a chamfering section 13; the broaching section 12 is used for broaching the surface of an inner hole of a workpiece to be machined to form a key groove; the width of the broach body 1 is larger than that of the key groove; the chamfering block 2 is embedded in the chamfering section 13 and is fixed through a connecting structure; the broach cutter body 1 is rectangular and long in shape as a whole, and the edges of the broach cutter body are chamfered edges.

In this embodiment, the broach body 1 is an integrally formed structure, the length of the broaching section 12 is greater than that of the broaching section 11, and the length of the broaching section 11 is greater than that of the chamfering section 13; widening the broach body 1, uniformly changing the broach body into a broach with a wide broach body, and uniformly changing the widths of the broach bodies with the same specification and different tolerances into one size; when the inner hole key groove width is 16+0.12/+0.05mm, 16 +/-0.021 mm and 16-0.018/-0.061mm, the width of the broach body 1 is 20mm, so that the same guide sleeve can be used for processing workpieces with the same aperture, the same key width and different tolerances, and the tooling cost is saved; through the embedding of chamfer piece 2 establish for be convenient for change the chamfer piece 2 of different models.

A gasket can be arranged between the chamfering block 2 and the fixing groove 131, and when a shallow key is machined, the gasket is added below the chamfering block; when processing dark key, just change the chamfer piece 2 of different models, through increasing the gasket or changing the chamfer piece 2 of highly difference for this broach can process the product that the same key is wide, different keys are dark, and dark key and shallow key all can process the chamfer with same broach.

The embodiment is further configured as follows: and two opposite side surfaces of the outer side end of the pull head section 11 are provided with mounting grooves 111.

In this embodiment, the mounting groove is a rectangular groove, the mounting groove 111 is used in cooperation with a broaching machine, and the broach body 1 is fixed to the broaching machine through the mounting groove 111 on the broach head section 11.

The embodiment is further configured as follows: a plurality of broaching teeth 121 which are uniformly arranged are arranged on the broaching section 12.

In this embodiment, the plurality of broaching teeth 121 and the broaching section 12 are integrally formed, and the upper ends of the broaching teeth 121 form an acute angle and an obtuse angle, the acute angle faces the direction of the broaching section 11, and the obtuse angle faces the direction of the chamfering section 13; a broaching groove 122 is formed between two adjacent broaching teeth 121.

The embodiment is further configured as follows: a fixing groove 131 is formed in the chamfering section 13, and the chamfering block 2 is installed in the fixing groove 131.

In this embodiment, the whole strip form that is of fixed slot 131, the width direction of fixed slot 131 runs through the outside that extends to broach cutter body 1 for be convenient for insert chamfer piece 2 from the side of fixed slot 131, fixed slot 131 length direction's bottom both ends are the arcwall face, chamfer piece 2's bottom both ends also are the arc structure, the arcwall face suits with the arc structure.

The embodiment is further configured as follows: the fixing structure is a locking screw 3, and the locking screw 3 penetrates through the chamfering section 13 and is screwed in the chamfering block 2.

In this embodiment, a countersunk hole is formed in the bottom of the chamfer section 13, the countersunk hole extends into the fixing groove 131, a threaded hole is formed in the chamfer block 2, and the locking screw 3 is matched with the countersunk hole and the threaded hole for use.

The embodiment is further configured as follows: the chamfer block 2 is provided with a plurality of convex blocks 21 which are uniformly arranged, and the convex blocks 21 are provided with chamfer teeth 22.

In this embodiment, the chamfer block 2 is an integrally formed structure, the chamfer block 2 is made of alloy, the whole chamfer tooth 22 is inclined towards the broaching tooth 121, the height of the outer surface of the protruding block 21 is lower than that of the chamfer tooth 22, and the height of the outer surface of the chamfer tooth 22 is lower than that of the outer surface of the broaching tooth 121.

The working principle of the invention is as follows:

this broach passes through the broach section and fixes the broach on the broaching machine, has a plurality of broaching teeth on the broaching section, treats the hole surface of machined part through the broaching tooth and carries out the broaching and form the keyway, and the chamfer section has a plurality of chamfer teeth, chamfer and burring to the keyway both ends after pulling out through the chamfer tooth.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.