CN220840011U - Trimming tool for hole end of workpiece - Google Patents

Abstract

The application discloses a trimming tool for a hole end of a workpiece, which comprises a Z-shaped rod, wherein the end part of the Z-shaped rod is connected with a trimming column, the bottom side of the trimming column is provided with a conical head, and a trimming blade is arranged on the trimming column and the side edge of the conical head in a consecutive manner. The trimming column is provided with a positioning rod which is embedded into the hole site of the workpiece and keeps the trimming column and the hole site coaxial, and the positioning rod is provided with a positioning round block which is attached to the inner wall of the hole site. The locating rod extending into the hole of the workpiece and the detachable locating round block matched with the inner diameter of the hole are arranged on the bottom side of the trimming cutter in an extending mode, the trimming cutter and the hole can be guaranteed to be coaxial when the burrs at the end of the hole are removed, and the problem of left-right deflection of the tool in the conventional manual deburring operation is solved. Meanwhile, under the coaxial effect of the cutter and the hole site, the deburring blade can gradually remove burrs, so that the problem of extrusion of burrs in the hole can be solved, damage to the inner wall of the hole in the deburring process is avoided, and the hole site machining quality of the workpiece is guaranteed.

Description

Trimming tool for hole end of workpiece

Technical Field

The application relates to the technical field of hole site trimming, in particular to a trimming tool for a hole end of a workpiece.

Background

In the machining process of the metal workpiece, a perforation is formed on the workpiece due to the process requirement, and the perforation is used for connecting the workpiece at a later stage, penetrating a line or a line pipe and the like, such as a flange perforation is used for connecting and fastening a flange.

The workpiece is usually formed by drilling and milling during perforation processing, and the surface and the side periphery of the workpiece are usually formed by turning or milling, so that the perforation and the processing of the workpiece in other directions belong to different processing technologies. The different processing technologies have no continuity when not processing, so that processing burrs can be formed at the edge line of the end part of the perforation, which is connected with the upper surface and the lower surface, after the upper surface and the lower surface of the workpiece are milled, and the processing burrs are manually removed in the later stage, so that the smoothness of the hole position is improved, and the defect that the burrs cut to operators or pipelines is avoided.

At present, the manual deburring uses a deburring tool, including the structure of single blade and the cylindricality deburring tool that adapts to the hole site, and to the cylindricality deburring tool that is exclusively used in the hole site, as shown in the figure 4 of description, its when the deburring, the embedding location is to the tip of hole site, and the deburring sword that one side set up then realizes the removal to the burr along circumference rotation, and at present when getting rid of, the side week of deburring sword (except deburring sword other parts) all contacts with the burr that does not get rid of, and have extrusion effect (shown in figure 5) to the burr, lead to burr and the laminating of the inner wall of hole site, can cause the fish tail of hole inner wall, the contact of burr and cutter side week still can cause the fish tail of cylindricality deburring tool equally, shorten its use duration. Meanwhile, when the cylindrical trimming cutter is used, the cylindrical trimming cutter is pressed down in the hole site, so that the cylindrical trimming cutter can deflect left and right during extrusion, and the smooth performance of burr cleaning is affected.

Disclosure of Invention

Aiming at the problems, the application aims to provide a trimming tool for the hole end of a workpiece, solves the problem of left and right deflection of the tool during the existing manual deburring operation, and also solves the problem of extrusion of burrs in the hole, thereby avoiding damage to the inner wall of the hole in the deburring process and ensuring the machining quality of the hole site of the workpiece.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows: the utility model provides a deburring instrument for work piece hole end, this deburring instrument includes Z type pole, and its end connection has the trimming post, and this trimming post downside is provided with the conical head to and be provided with the deburring sword at trimming post and conical head side consecutively, its characterized in that: and the trimming column is provided with a positioning device which is embedded into the hole site of the workpiece and keeps the trimming column and the hole site coaxial.

Preferably, the positioning device is a positioning rod which extends downwards from the center of the bottom side of the conical head and stretches into the hole site, and a coaxial positioning piece which is attached to the inner wall of the hole site is arranged on the positioning rod.

Preferably, the coaxial positioning piece is a positioning round block which is detachably sleeved on the positioning rod and is attached to the inner wall of the hole site in a sliding manner.

Preferably, the positioning rod and the positioning round block are both provided with an arc chamfer structure at one end far away from the conical head.

The beneficial effects of the application are as follows: the locating rod extending into the hole of the workpiece and the detachable locating round block matched with the inner diameter of the hole are arranged on the bottom side of the trimming cutter in an extending mode, the trimming cutter and the hole can be guaranteed to be coaxial when the burrs at the end of the hole are removed, and the problem of left-right deflection of the tool in the conventional manual deburring operation is solved. Meanwhile, under the coaxial effect of the cutter and the hole site, the deburring blade can gradually remove burrs, so that the problem of extrusion of burrs in the hole can be solved, the damage to the inner wall of the hole in the deburring process is avoided, the processing quality of the hole site of the workpiece is ensured, reworking is avoided, and the rejection rate is reduced.

Drawings

Fig. 1 is a structural view of a cylindrical deburring tool of the prior art.

Fig. 2 is a prior art workpiece hole site illustration.

Fig. 3 is an enlarged view of burrs in the hole site of fig. 2.

Fig. 4 is a diagram of a prior art cylindrical deburring tool trimming a burr in a hole site.

Fig. 5 is an enlarged view of the structure at B in fig. 4.

Fig. 6 is an exploded view of the deburring tool of the present application.

Fig. 7 is a schematic representation of deburring a hole with a deburring tool according to the present application.

In the figure: 5-a workpiece; 5 a-holes; b-burrs.

Detailed Description

In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 7, a deburring tool for the hole end of a workpiece is shown, which comprises a Z-shaped bar 1 which is detachably connected to a deburring handle (not shown), typically for changing deburring tools of different types or sizes. The end of the Z-shaped rod 1 is connected with a trimming post 2, the bottom side of the trimming post 2 is provided with a conical head 21, and a trimming blade 2a is arranged on the trimming post 2 and the side edge of the conical head 21 in a consecutive manner. During trimming operation, the conical head 21 is stretched into the hole by the trimming handle and is pressed downwards to enable the conical head 21 to be in contact with and limited at the end part of the hole site (in the state shown in fig. 4), and then the trimming blade 2a of the Z-shaped rod 1 is driven to rotate along the circumferential direction of the edge of the end part of the hole site by driving the Z-shaped rod 1 to rotate integrally with the trimming column 2, so that burrs can be removed, and the hole site trimming operation is realized.

In order to solve the problems of extrusion and deflection of the trimming cutter caused by unremoved burrs during hole site trimming operation at present, the application is characterized in that a positioning device which is embedded into a workpiece hole site and keeps the trimming column 2 and the hole site coaxial is arranged on the trimming column 2. The positioning device realizes the coaxial positioning of the trimming column 2 and the trimming column by means of the inner wall of the hole site, and solves the problem that the left-right deflection influences the smooth trimming operation due to downward extrusion when the trimming tool is operated at present. On the basis of realizing coaxial positioning, the downward extrusion force of the deburring cutter is limited and controlled, so that the deburring blade 2a can gradually trim from the outer side edge of the burr to the inner side edge connected with the hole site, and further, other parts of the conical head 21 except the deburring blade 2a are in contact extrusion with the burr, namely, the problem of scratch on the inner wall of the hole and the surface of the conical head 21 caused by extrusion of the burr is solved. The preferred edge 2a extends beyond the outer wall surface of the conical head 21 to further ensure that the conical head 21 does not press against the burr when the edge 2a is in contact with the burr.

Specifically, as shown in fig. 6-7, the positioning device is a positioning rod 3 extending downwards from the center of the bottom side of the conical head 21 and extending into the hole site, and a coaxial positioning piece attached to the inner wall of the hole site is arranged on the positioning rod 3. The coaxial positioning piece is preferably in clearance fit with the inner wall of a hole site of a workpiece, the coaxial positioning piece is embedded from the top end of the hole site (as burrs are usually sheet-shaped, when the coaxial positioning piece is embedded, the burrs partially positioned in the hole site can be manually turned outwards so as to be embedded into the hole), namely, the coaxial positioning of the whole trimming column 2 and the hole site is realized, and the problem that a cutter is deflected due to manual extrusion when the rotary trimming column 2 performs the burr removing operation is solved; meanwhile, under the coaxial positioning effect, the deburring blade 2a gradually removes burrs in the radial direction, so that the problem that the inner wall of the hole is scratched due to the fact that the conical head 21 extrudes the burrs is solved. And the deburring blade 2a protrudes beyond the surface of the conical head 21, i.e. the conical head 21 does not further squeeze the burr.

Specifically, as shown in fig. 6-7, the coaxial positioning piece is a positioning round block 4 which is detachably sleeved on the positioning rod 3 and is attached to the inner wall of the hole to slide, and the positioning round block is preferably made of hard rubber material, so that the inner wall of the hole can be prevented from being scratched by the metal material after the positioning round block contacts with the inner wall of the hole. And the structure that can dismantle the setting is convenient for change the location circle piece 4 of adaptation external diameter according to the aperture, improves this deburring instrument's suitability. Since the trimming blade 2a is provided in a bevel structure, the trimming blade 2a needs to be moved downward in the process of cleaning burrs from the outer side to the inner side contacting the hole end, and thus the gradual removal of burrs by the trimming blade 2a is realized by driving the trimming handle and sliding the positioning knob 4 downward along the inner wall of the hole.

In order to facilitate the disassembly and replacement of the positioning round block 4 and the positioning rod 3, and the smooth embedding of the positioning round block 4 into the hole site, as shown in fig. 6-7, it is preferable that the positioning rod 3 and the positioning round block 4 are provided with arc chamfer structures at the ends far away from the conical head 21. Because the locating rod 3 and the locating round block 4, and the locating round block 4 and the inner wall of the hole are in clearance fit (which can improve the locating precision), the end parts of the locating rod 3 and the locating round block 4 are both arranged into arc chamfer structures, and the locating round block 4 can be conveniently assembled and embedded smoothly.

The principle of the application is as follows: the bottom side of the current round hole trimming cutter extends to form a positioning rod which can extend into a hole of a workpiece, and a positioning round block 4 which is matched with the inner diameter of the hole is detachably assembled on the positioning rod, and the positioning round block is in clearance fit with the inner wall of the hole to ensure that the trimming cutter is coaxial with the hole. During operation, the trimming handle is driven to rotate and simultaneously extrude downwards, so that the trimming blade 2a can be gradually removed from the side edge of the burr towards the joint with the hole end, the problem of extrusion of the burr in the hole can be solved, and the damage to the inner wall of the hole in the burr removing process is avoided.

The foregoing has shown and described the basic principles, principal features and advantages of the application. The present application is subject to various changes and modifications without departing from the spirit and scope thereof, and such changes and modifications fall within the scope of the application as hereinafter claimed.

Claims (4)

1. A trimming tool for a hole end of a workpiece, the trimming tool comprising a Z-shaped rod (1) with an end connected with a trimming post (2), a conical head (21) arranged at the bottom side of the trimming post (2), and a trimming blade (2 a) arranged at the side edge of the trimming post (2) and the conical head (21) in a coherent manner, wherein: and a positioning device which is embedded into the hole site of the workpiece and keeps the trimming column (2) coaxial with the hole site is arranged on the trimming column (2).

2. The trimming tool according to claim 1, wherein: the positioning device is a positioning rod (3) which extends downwards from the center of the bottom side of the conical head (21) and stretches into the hole site, and a coaxial positioning piece attached to the inner wall of the hole site is arranged on the positioning rod (3).

3. The trimming tool according to claim 2, wherein: the coaxial positioning piece is a positioning round block (4) which is detachably sleeved on the positioning rod (3) and is attached to the inner wall of the hole site in a sliding manner.

4. The trimming tool according to claim 3, wherein: and one ends of the positioning rod (3) and the positioning round block (4), which are far away from the conical head (21), are provided with arc chamfer structures.