CN112809083A - Combined broach - Google Patents

Abstract

The invention discloses a combined broach, which mainly comprises a broach handle connecting mandrel and the like, wherein a correction section, a rough-drawing section and a broach handle section are sequentially sleeved on the broach handle connecting mandrel from inside to outside, and an axial positioning block is connected in an axial positioning groove at the tail end of the broach handle connecting mandrel so as to axially limit the broach handle section, the rough-drawing section and the correction section. The combined broach structure is adopted, and when the wear of cutter teeth of each part of the broach exceeds the range of dimensional tolerance, the broach can be continuously used by replacing a cutter body of the worn part; the broaching part of the broaching tool is subjected to surface wear-resistant coating treatment independently, so that the service life of the broaching tool can be greatly prolonged, and the cost of the coating can be reduced by local coating; the same broaching tool processing mode adopts layered broaching and block broaching, and the broaching tool processing technology is simple; the phases of the rough-drawing part and the correcting tooth part are mutually matched by adopting a group of parallel step surfaces for phase fixing, and a leading tooth is arranged at the correcting tooth part for phase correction.

Description

Combined broach

Technical Field

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

Background

The existing broach structure adopts an integral structure, and the manufacture of the tool is finished by a material in a machining mode, and mainly comprises a clamping tool bit 11, a guide part 12, a cutting part 13, a correcting part 14 and a lifting tool shank part 15. The prior art scheme mainly has the following defects: in order to prolong the service life of the cutter, the integral broach is processed by adopting a tool material with high alloy content, in order to improve the dimensional stability of the shaping part, a better material is needed to process the broach, a large amount of alloy elements needed in tool steel are consumed, and the use cost of the broach is improved; the size of the broach conforms to the program, which is the main index for determining the service life of the broach, but not whether the worn state of the broach can be cut or not, so that the service life of the broach and the production cost of the garland key are influenced; the surface of the broach is coated with a wear-resistant coating, the coating process can not carry out local coating but only carry out integral coating, the process cost of the coating is higher, and the coating has positive correlation with the size of a part needing coating, so the integral coating cost is higher; the same broaching tool processing mode adopts layered broaching and block broaching, and the broaching tool processing technology is complex.

Disclosure of Invention

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

The purpose of the invention is achieved by the following technical scheme: the combined broach mainly comprises a broach handle connecting mandrel, an axial positioning block, a broach handle section, a rough-drawing section and a correcting section, wherein the correcting section, the rough-drawing section and the broach handle section are sequentially sleeved on the broach handle connecting mandrel from inside to outside, and an axial positioning block is connected in an axial positioning groove at the tail end of the broach handle connecting mandrel so as to axially limit the broach handle section, the rough-drawing section and the correcting section.

The tool lifting handle connecting mandrel is provided with a group of parallel outward protruding step surfaces at the contact positions of the tool lifting handle section, the rough drawing section and the correction section in pairs, and the outward protruding step surfaces are used for circumferential positioning of the rough drawing section and the correction section.

The rough-drawing section is divided into a plurality of sections according to the length requirement for installation.

The correcting section correcting tooth part is provided with a leading tooth for phase correction.

The invention has the beneficial effects that: the combined broach structure is adopted, and when the wear of cutter teeth of each part of the broach exceeds the range of dimensional tolerance, the broach can be continuously used by replacing a cutter body of the worn part; the broaching tool of the broaching part of the broaching tool is subjected to surface wear-resistant coating treatment independently, so that the service life of the broaching tool can be greatly prolonged, the cost of the coating can be reduced by local coating, the number of parts machined within the dimensional tolerance by the same broaching tool grinding can be increased, the stability of the product quality is improved, and the tool material is saved; the same broaching tool processing mode adopts layered broaching and segmented broaching, the broaching tool processing technology is simple, each cutting part is processed into a processing mode, and a comprehensive broaching mode is formed after combination; the phases of the rough-drawing part and the correcting tooth part are mutually matched by adopting a group of parallel step surfaces for phase fixing, and a leading tooth is arranged at the correcting tooth part for phase correction.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a structural sectional view of the present invention.

Fig. 3 is a schematic view of an assembly structure of the present invention.

FIG. 4 is a schematic view of an axial positioning block of the present invention.

Description of reference numerals: the tool holder comprises a tool holder connecting mandrel 1, an axial positioning block 2, a tool holder section 3, a rough drawing section 4, a correcting section 5, a tool clamping head 11, a guide part 12, a cutting part 13, a correcting part 14 and a tool holder part 15.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

example (b): as shown in the attached drawings, the combined broach mainly comprises a broach handle connecting mandrel 1, an axial positioning block 2, a broach handle section 3, a rough-drawing section 4 and a correcting section 5, wherein the correcting section 5, the rough-drawing section 4 and the broach handle section 3 are sequentially sleeved on the broach handle connecting mandrel 1 from inside to outside, and the rough-drawing section 4 is installed in several sections according to the length requirement. The correcting section 5 sets a leading tooth on the correcting tooth part for phase correction. An axial positioning block 2 is connected in an axial positioning groove at the tail end of the lifting handle connecting mandrel 1 so as to axially limit the handle section 3, the rough-drawing section 4 and the correcting section 5. The tool-lifting handle connecting mandrel 1 is provided with a group of parallel outward-protruding step surfaces at the contact positions of the tool-lifting handle section 3, the rough-drawing section 4 and the correction section 5 in pairs, and the parallel outward-protruding step surfaces are used for circumferential positioning of the rough-drawing section 4 and the correction section 5.

When the broaching tool holder connecting mandrel is installed, the broaching tool holder connecting mandrel 1, the broaching tool holder section 3, the rough-drawing section 4 and the correcting section 5 are assembled, and then the axial positioning block 2 is clamped into the axial positioning groove at the end part of the broaching tool holder connecting mandrel 1 to be axially fixed, so that the axial force generated during broaching is borne.

The invention is a combined structure, the cutting part of the broach is processed by the broach material, the non-cutting part of the broach is made of the common structural steel material, and the cutting part of the cutter is made of the cutter material with high alloy and high wear resistance, thereby reducing the use of noble alloy elements, reducing the total manufacturing cost of the cutter and prolonging the service life of the cutter. For the hollow cutting part broach material, with the increase of the usage of the broach material, the material can be made into tubular materials with various specifications, and the tubular material standard is gradually formed, so that a large amount of precious alloy element materials can be saved, and the processing time of the combined broach can be reduced. By adopting the combined broach structure with the cutting teeth and the correcting teeth, the broach can not be used when the cutting teeth and the correcting teeth are worn to the limit, if the cutting teeth of the front cutting part can also be used, the broach can be continuously used by replacing the correcting teeth part, otherwise, if the cutting teeth of the front cutting part cannot be used after being worn, the broach can be continuously used by replacing the cutting teeth part. Through the surface coating treatment of the broach of the correction tooth part, the service life of the correction tooth can be greatly prolonged, the cost of the coating can be reduced by the local coating, and the usage amount of the broach coating can be increased at the place needing to be applied, so that the service life of the broach is prolonged. The same broaching tool processing mode adopts layered broaching and segmented broaching, the broaching tool processing technology is simple, each part is processed into a processing mode, and a comprehensive broaching mode is formed after combination.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.

Claims (4)

1. A combined broach is characterized in that: the novel broach handle connecting device mainly comprises a broach handle connecting shaft (1), an axial positioning block (2), a broach handle section (3), a rough drawing section (4) and a correcting section (5), wherein the correcting section (5), the rough drawing section (4) and the broach handle section (3) are sequentially sleeved on the broach handle connecting shaft (1) from inside to outside, and the axial positioning block (2) is connected in an axial positioning groove at the tail end of the broach handle connecting shaft (1) to carry out axial limiting on the broach handle section (3), the rough drawing section (4) and the correcting section (5).

2. The combination broach according to claim 1, in which: a group of parallel outward protruding step surfaces are designed at the contact positions of the broach handle section (3), the rough-drawing section (4) and the correction section (5) of the broach handle connecting mandrel (1) in pairs and are used for circumferential positioning of the rough-drawing section (4) and the correction section (5).

3. The combination broach according to claim 1, in which: the rough drawing section (4) is divided into a plurality of sections according to the length requirement for installation.

4. The combination broach according to claim 1, in which: the correcting section (5) sets a leading tooth on the correcting tooth part for phase correction.

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