Workpiece centering device of numerical control machine tool

Abstract

The utility model relates to the technical field of machining, in particular to a workpiece centering device for a numerical control machine tool, which is characterized in that a protective mechanism is arranged on a swing shaft at the lower part of a centering rod, so that the abrasion of the swing shaft during use is reduced, and the protective mechanism is detachable and can be replaced after being abraded, so that the production cost is reduced. The whole centering rod does not need to be replaced, and economical efficiency and practicability are improved; comprising a centering rod, and a swing shaft is arranged on the lower portion of the centering rod. The device further comprises a protection mechanism, the protection mechanism is installed on the lower portion of the swing shaft, the protection mechanism and the swing shaft are detachably connected, and the protection mechanism has the function of protecting the swing shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of machining, and in particular to a workpiece centering device for CNC machine tools. Background Technology

[0002] A centering bar, also known as an edge finder, is a tool primarily used in CNC machining to accurately determine the center position of a workpiece. Currently, the most commonly used centering device is the eccentric centering bar. For example, utility model patent application number 202320208537.1 discloses a centering bar, which mainly consists of a floating shaft, a swing shaft, and a spring. In use, the floating shaft is clamped and fixed to the machine tool's drill chuck. The machine tool then drives the floating shaft and swing shaft to rotate, causing the rotating swing shaft to contact the workpiece to be centered. The position of the swing shaft's eccentricity is observed, and the center of the workpiece is determined by the two points of contact between the swing shaft and the workpiece. However, this design has the following problems: because the lower part of the centering bar contacts the workpiece while rotating, it is prone to wear after prolonged use, affecting the accuracy of the detection. Furthermore, since the centering bar is a one-piece design, excessive wear on the lower part necessitates replacing the entire centering bar, resulting in high replacement costs, inconvenience, and poor economic efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a CNC machine tool workpiece centering device that reduces wear on the swing shaft at the lower part of the centering bar by setting a protective mechanism. The protective mechanism is detachable, and when it wears out, it can be replaced without replacing the entire centering bar, thus improving the economy and practicality of the device.

[0004] This utility model discloses a CNC machine tool workpiece centering device, including a centering bar with a swing shaft at its lower part; it also includes a protective mechanism installed at the lower part of the swing shaft, with a detachable connection between the protective mechanism and the swing shaft, and the protective mechanism serves to protect the swing shaft; during use, the swing shaft contacts the workpiece through the protective mechanism, thereby centering the workpiece; when the protective mechanism wears out, it can be removed from the swing shaft and replaced with a new one; by setting the protective mechanism on the swing shaft at the lower part of the centering bar, the wear of the swing shaft during use is reduced, and since the protective mechanism is detachable, it can be replaced when worn, without replacing the entire centering bar, thus improving economy and practicality.

[0005] Preferably, the protective mechanism includes a protective sleeve and an installation mechanism. The protective sleeve is coaxial with the swing shaft and is fixed to the lower part of the swing shaft by the installation mechanism. The protective sleeve is cylindrical in shape, and the installation mechanism has the function of installation. The diameter of the protective sleeve and the diameter of the swing shaft are both known. When centering the workpiece, the centering bar drives the swing shaft and the protective sleeve to rotate, and then the rotating protective sleeve contacts the workpiece. At the same time, it is observed when the swing shaft becomes eccentric on the centering bar. Then, another point on the workpiece is touched for detection. Since the protective sleeve contacts the workpiece when centering the workpiece, the wear on the swing shaft is reduced and the service life of the swing shaft is improved.

[0006] Preferably, the mounting mechanism includes multiple sets of bolts, the lower part of the swing shaft is provided with multiple sets of threaded holes, and the protective sleeve is provided with multiple through holes. The multiple sets of bolts pass through the multiple through holes on the protective sleeve and are screwed into the multiple sets of threaded holes. When the protective sleeve is installed on the swing shaft, the protective sleeve is fitted onto the lower part of the swing shaft, and then the multiple bolts are passed through the multiple through holes of the protective sleeve and screwed into the multiple threaded holes to fix the protective sleeve to the swing shaft. When the protective sleeve is worn, the worn protective sleeve can be removed from the swing shaft and replaced with a new one, which facilitates the replacement of the protective sleeve.

[0007] Preferably, it also includes a positioning block. The lower part of the swing shaft is provided with a positioning groove, which is coaxial with the swing shaft. The protective sleeve is provided with a positioning block, which works in conjunction with the positioning groove. With the above arrangement, when the protective sleeve is installed on the swing shaft, the positioning block is inserted into the positioning groove at the lower part of the swing shaft, ensuring the coaxiality between the swing shaft and the protective sleeve.

[0008] Preferably, the multiple sets of threaded holes are evenly distributed around the axis of the swing shaft.

[0009] Preferably, the outer wall of the protective cover is provided with a wear-resistant coating; this feature improves the wear resistance of the protective cover and extends its service life.

[0010] Preferably, both the positioning block and the positioning groove are circular in shape.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a protective mechanism on the swing shaft at the lower part of the centering bar, the wear of the swing shaft during use is reduced, and the protective mechanism is detachable. When the protective mechanism is worn, it can be replaced without replacing the entire centering bar, thus improving economy and practicality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0013] Figure 2This is an exploded view of this utility model;

[0014] Figure 3 This is a cross-sectional view of the protective case;

[0015] Figure 4 This is an exploded view of this utility model;

[0016] Figure 5 yes Figure 2 A magnified structural diagram of part A in the middle.

[0017] The following are labels in the attached diagram: 1. Centering rod; 2. Swing shaft; 3. Protective sleeve; 4. Bolt; 5. Threaded hole; 6. Positioning groove; 7. Positioning block. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0019] like Figures 1 to 5 The CNC machine tool workpiece centering device of this utility model includes a centering bar 1 and a protective mechanism. A swing shaft 2 is provided at the lower part of the centering bar 1, and the protective mechanism is installed at the lower part of the swing shaft 2. The protective mechanism and the swing shaft 2 are detachably connected, and the protective mechanism has the function of protecting the swing shaft 2. In use, the swing shaft 2 contacts the workpiece through the protective mechanism, thereby centering the workpiece. When the protective mechanism is worn, it can be removed from the swing shaft 2 and replaced with a new one. By setting the protective mechanism on the swing shaft 2 at the lower part of the centering bar 1, the wear of the swing shaft 2 during use is reduced. Moreover, the protective mechanism is detachable, so when it is worn, it can be replaced without replacing the entire centering bar 1, which improves economy and practicality.

[0020] like Figure 1 , Figure 2 and Figure 4The protective mechanism includes a protective sleeve 3 and an installation mechanism. The protective sleeve 3 is coaxial with the swing shaft 2. The protective sleeve 3 is fixed to the lower part of the swing shaft 2 by the installation mechanism. The protective sleeve 3 is cylindrical in shape. The installation mechanism has the function of installation. The diameter of the protective sleeve 3 and the diameter of the swing shaft 2 are known. When centering the workpiece, the centering rod 1 drives the swing shaft 2 and the protective sleeve 3 to rotate. Then, the rotating protective sleeve 3 contacts the workpiece. At the same time, it is observed when the swing shaft 2 becomes eccentric on the centering rod 1. Then, another point on the workpiece is touched for detection. Since the protective sleeve 3 contacts the workpiece when centering the workpiece, the wear on the swing shaft 2 is reduced and the service life of the swing shaft 2 is improved.

[0021] like Figure 3 and Figure 4 The mounting mechanism includes multiple sets of bolts 4, and the lower part of the swing shaft 2 is provided with multiple sets of threaded holes 5. The protective sleeve 3 is provided with multiple through holes. The multiple sets of bolts 4 pass through the multiple through holes on the protective sleeve 3 and are screwed into the multiple sets of threaded holes 5. When the protective sleeve 3 is installed on the swing shaft 2, the protective sleeve 3 is fitted onto the lower part of the swing shaft 2, and then the multiple bolts 4 are passed through the multiple through holes of the protective sleeve 3 and screwed into the multiple threaded holes 5 to fix the protective sleeve 3 to the swing shaft 2. When the protective sleeve 3 is worn, the worn protective sleeve 3 can be removed from the swing shaft 2 and replaced with a new protective sleeve 3, which facilitates the replacement of the protective sleeve 3.

[0022] like Figure 2 and Figure 3 It also includes a positioning block 7. The lower part of the swing shaft 2 is provided with a positioning groove 6, which is coaxial with the swing shaft 2. The protective sleeve 3 is provided with a positioning block 7, which works in conjunction with the positioning groove 6. With the above settings, when the protective sleeve 3 is installed on the swing shaft 2, the positioning block 7 is inserted into the positioning groove 6 at the lower part of the swing shaft 2, ensuring the coaxiality between the swing shaft 2 and the protective sleeve 3.

[0023] Multiple threaded holes 5 are evenly distributed around the axis of the swing shaft 2; the positioning block 7 and the positioning groove 6 are both circular in shape. Example 2

[0024] Based on Example 1, a wear-resistant coating is provided on the outer wall of the protective sleeve 3; through the above-mentioned provision, the wear resistance of the protective sleeve 3 is improved, and the service life of the protective sleeve 3 is increased.

[0025] The centering bar 1 and bolt 4 of the CNC machine tool workpiece centering device of this utility model are both purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A workpiece centering device for a numerically controlled machine tool, comprising a centering bar (1), a lower part of the centering bar (1) being provided with a swivel axis (2); characterized in that, The protection mechanism is installed at the lower part of the swing shaft (2), and is detachably connected with the swing shaft (2) and has the function of protecting the swing shaft (2).

2. A workpiece centering device for a numerically controlled machine tool as claimed in claim 1, characterized in that The protection mechanism comprises a protection sleeve (3) coaxial with the swing shaft (2) and a mounting mechanism.

3. A workpiece centering device for a numerically controlled machine tool as claimed in claim 2, wherein, The mounting mechanism comprises a plurality of bolts (4), the lower part of the swing shaft (2) is provided with a plurality of threaded holes (5), the protection sleeve (3) is provided with a plurality of through holes, and the plurality of bolts (4) are screwed with the plurality of threaded holes (5) after penetrating through the plurality of through holes of the protection sleeve (3).

4. A workpiece centering device for a numerically controlled machine tool as claimed in claim 2, wherein, The lower part of the swing shaft (2) is provided with a positioning groove (6) coaxial with the swing shaft (2), and the protection sleeve (3) is provided with a positioning block (7).

5. A workpiece centering device for a numerically controlled machine tool as claimed in claim 3, wherein, The plurality of threaded holes (5) are uniformly distributed in a circle with the axis of the swing shaft (2) as the center.

6. A workpiece centering device for a numerically controlled machine tool as claimed in claim 2, wherein, The outer wall of the protection sleeve (3) is provided with a wear-resistant coating.

7. A workpiece centering device for a numerically controlled machine tool as claimed in claim 4, wherein, The positioning block (7) and the positioning groove (6) are both circular in shape.

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