A servo power turret tool holder assembly capable of automatic tool change

Abstract

The utility model provides a kind of servo power tool rest assembly of automatic tool changing. The servo power tool rest assembly of automatic tool changing includes tool rest main body, tool rest, auxiliary support component. The driving shaft driven by servo power mechanism is arranged at the central axis of tool rest main body, and the driving shaft extends outward;Tool rest is arranged on the driving shaft of tool rest main body, and its outer circumferential surface is equidistantly provided with a plurality of installation positions for installing tool holder;Auxiliary support component includes support ring, pneumatic telescopic rod and gas supply part;Support ring is installed on the outer circumferential inner edge of tool rest and located on the side of installation position;At least two pneumatic telescopic rods are a group, and multiple groups of pneumatic telescopic rods are one-to-one corresponding with installation position and installed on the annular surface of support ring, and the movable end of pneumatic telescopic rod extends into the tool holder located in installation position;Gas supply part is installed on tool rest main body and is communicated with pneumatic telescopic rod through support ring. The utility model can support and position tool holder through auxiliary support component, and improve connection stability.

Description

Technical Field

[0001] This utility model relates to the field of turret tool holder technology, and in particular to a servo-powered turret tool holder assembly with automatic tool changing capability. Background Technology

[0002] Currently, in the field of CNC machine tools, servo motors are commonly used to drive the rotary motion mechanism of the tool turret to achieve automatic tool changing. This involves configuring a servo drive system on the turret base to achieve precise positioning and rotation of the tool holder unit around the spindle axis, thereby achieving the goal of automatically switching machining tools. However, in practical applications, the tool holder and tool holder mounting positions require manual axial alignment. Due to the lack of effective limiting structures, misalignment is prone to occur during tightening. Furthermore, when the machine tool performs high-speed cutting, the vibration caused by the cutting force can lead to a decrease in bolt preload, subsequently causing circumferential movement of the tool and affecting machining results. Utility Model Content

[0003] Therefore, it is necessary to provide a servo-powered turret tool holder assembly with automatic tool changing to address the problem of easy misalignment and displacement of existing tool holders.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A servo-powered turret tool holder assembly with automatic tool changing mainly consists of a turret body, a tool holder, and auxiliary support components.

[0006] A drive shaft driven by a servo power mechanism is provided at the central axis of the turret body, and the drive shaft extends outward.

[0007] The tool holder is mounted on the drive shaft of the turret body, and its outer circumference has multiple mounting positions for mounting the tool holder at equal intervals;

[0008] The auxiliary support components include a support ring, a pneumatic telescopic rod, and an air source component; the support ring is installed on the inner edge of the outer periphery of the tool holder and is located beside the mounting position; at least two pneumatic telescopic rods form a group, and multiple groups of pneumatic telescopic rods correspond one-to-one with the mounting positions and are installed on the ring surface of the support ring, with the movable end of the pneumatic telescopic rod extending into the tool holder located at the mounting position; the air source component is installed on the turret body and communicates with the pneumatic telescopic rod through the support ring.

[0009] Furthermore, the support ring includes an inner ring, an outer ring, and a seal; the outer ring is fitted around the outer circumference of the inner ring, and the outer circumference of the inner ring is concave to form an annular groove. The inner wall of the annular groove has ventilation channels with the same number as the pneumatic telescopic rods along its radial direction. Each ventilation channel extends to the air source interface in the direction of the corresponding pneumatic telescopic rod; each ventilation channel is provided with a seal for closing the ventilation channel; the pipeline port of the air source component passes through the outer circumference and communicates with the annular groove of the inner ring.

[0010] Furthermore, the seal includes a piston and a connecting rod; the inner ring has an axially outwardly extending movable channel at the vent passage, with the end of the movable channel facing the air source component; the connecting rod extends from the movable channel into the vent passage and connects to the piston, the piston size is adapted to the cross-section of the vent passage, the diameter of the connecting rod is smaller than the diameter of the piston, and the piston slides into the movable channel to maintain the continuity of the vent passage.

[0011] Furthermore, a limiting ring is provided on the inner wall of the inner ring's active channel at the end opposite to the ventilation channel, and the connecting rod passes through the limiting ring.

[0012] Furthermore, the edge of the outer ring extends radially inward to cover the edge of the inner ring.

[0013] Furthermore, the air source unit consists of an exhaust pump and an intake pump, and is equipped with a switching valve to switch between the intake and exhaust paths.

[0014] Furthermore, an end block is fixed to one end of the connecting rod located outside the moving channel, and the diameter of the end block is larger than the diameter of the moving channel.

[0015] Furthermore, the mounting position of the tool holder is provided with a positioning groove that matches the protrusion and recess of the tool post.

[0016] Furthermore, a keyway is provided at the center of the tool holder's mounting position to restrict the tool holder's mounting direction.

[0017] Furthermore, a baffle is engaged in the mounting position on the tool holder where the tool post is not installed.

[0018] Compared with the prior art, the beneficial effects of this utility model include:

[0019] The auxiliary support components can support and position the tool holder, which not only assists in the installation of the tool holder, but also continues to support the tool holder after it is fixed to the tool holder with bolts, preventing the tool from moving due to loose bolts and improving the stability of the connection. Attached Figure Description

[0020] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0021] Figure 1 This is a perspective view of a servo-powered turret tool holder assembly with automatic tool changing, as described in this utility model.

[0022] Figure 2 Based on Figure 1 The structural schematic diagram of the support ring is shown below;

[0023] Figure 3Based on Figure 2 A diagram showing the distribution of ventilation channels within the inner ring.

[0024] Figure 4 Based on Figure 2 A schematic diagram showing the piston and connecting rod located inside the inner ring.

[0025] The following components are labeled in the diagram: 1. Turret body; 2. Tool holder; 3. Auxiliary support components; 31. Support ring; 311. Inner ring; 312. Outer ring; 313. Piston; 314. Connecting rod; 32. Pneumatic telescopic rod; 33. Air source component; 4. Baffle. Detailed Implementation

[0026] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0027] Example

[0028] like Figure 1 As shown in the figure, this embodiment introduces a servo-powered turret tool holder 2 assembly with automatic tool changing, mainly composed of a turret body 1, a tool holder 2, and auxiliary support components 3. A drive shaft driven by a servo power mechanism is provided at the central axis of the turret body 1, extending outward and connecting to the tool holder 2. The servo power mechanism is preferably a servo motor, integrated with the mounting position of the turret body. The tool holder 2 includes mounting positions for different types of tool holders on a ring-shaped base. The base is fixed to the drive shaft via a spline connection or other connection method. Each mounting position of the tool holder 2 is provided with a positioning groove that mates with the tool holder, and a keyway is provided at the center of the mounting position to limit the installation direction of the tool holder. The depth of the keyway is greater than the positioning groove, or the keyway extends into the interior of the tool holder 2. The tool holder has corresponding protrusions and key-adaptive positioning grooves and keyways. To protect the mounting positions, a baffle 4 is engaged for sealing protection at mounting positions where no tool holder is installed. A magnetic structure can also be added to improve the connection stability of the baffle 4.

[0029] Combination Figure 1 and Figure 2The auxiliary support component 3 adopts a ring-shaped distributed air circuit architecture, mainly including a support ring 31, a pneumatic telescopic rod 32, and an air source component 33. The support ring 31 consists of an inner ring 311 and an outer ring 312. The inner ring 311 is mounted on the tool holder 2 and rotates synchronously with the tool holder 2. The inner ring 311 is located inside the mounting position of the tool holder 2 and does not affect the tool mounting position. The outer ring 312 is located at the outer edge of the inner ring 311. Since the edge of the outer ring 312 extends radially inward to cover the edge of the inner ring 311, the outer ring 312 fits around the edge of the inner ring 311, and the two can rotate independently without affecting each other. The outer circumferential surface of the inner ring 311 is radially concave to form an annular groove, and the annular groove has the same number of air passages as the pneumatic telescopic rod 32 along its radial direction.

[0030] Taking two pneumatic telescopic rods 32 per set as an example, the two pneumatic telescopic rods 32 are located on both sides of the ventilation channel. The ventilation channel extends towards the pneumatic telescopic rods 32, meaning that the inner end of the ventilation channel splits into two branches extending towards the pneumatic telescopic rods 32, and these branches are connected to the air source interface of the pneumatic telescopic rods 32 via pipes. In practical applications, since some installation positions do not have tool holders, the pneumatic telescopic rods 32 are not needed for support and positioning. The ventilation channel can be sealed using a seal. That is, a seal is installed at the bifurcation of the ventilation channel.

[0031] like Figure 3 and Figure 4 As shown, the venting channel and its branch channels intersect at the axial direction of the inner ring 311, forming a movable channel. This movable channel is located on the side of the inner ring 311 away from the tool holder. A connecting rod 314 extends from the movable channel into the venting channel and connects to the piston 313. The piston 313's dimensions are adapted to the cross-section of the venting channel and also to the movable channel. When the piston 313 is located at the venting channel's intersection, it prevents the pneumatic telescopic rod 32 from communicating with the venting channel. The diameter of the connecting rod 314 is smaller than the diameter of the piston 313. A limit ring is provided on the inner wall of the movable channel at the end of the inner ring 311 away from the venting channel. The connecting rod 314 passes through the limit ring, which prevents the piston 313 from disengaging from the movable channel. An end block is fixed to the end of the connecting rod 314 outside the movable channel. The diameter of the end block is larger than the diameter of the movable channel, facilitating the operation of the connecting rod 314.

[0032] The air source component 33 consists of an exhaust pump and an intake pump, and is equipped with a switching valve to switch between the intake and exhaust paths. The pipe port connects to the outer ring 312 and extends into the annular groove of the inner ring 311. Taking the extension of the pneumatic telescopic rod 32 as an example, the air source component 33 supplies air, which enters from the outer ring 312 through the air pipe and then enters the pneumatic telescopic rod 32 through the ventilation channel of the annular groove, driving the pneumatic telescopic rod 32 to extend and support and position the tool holder. For positions without a tool holder, the piston 313 is pushed inward by the connecting rod 314 to block the ventilation channel. In practical applications, the extension and retraction of the connecting rod 314 can also be mechanically controlled, such as by an electric actuator or other mechanically actuated structures. The entire mechanism can be controlled by a PLC.

[0033] In this embodiment, the auxiliary support component 3 can support and position the tool holder. It not only assists in the installation of the tool holder, but also continues to support the tool holder after it is fixed to the tool holder 2 with bolts, so as to prevent the tool from moving due to loose bolts and improve the connection stability.

[0034] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A servo-powered turret tool holder assembly with automatic tool changing, characterized in that, It includes: The turret body (1) has a drive shaft driven by a servo power mechanism at its central axis, and the drive shaft extends outward. The tool holder (2) is set on the drive shaft of the turret body (1), and its outer circumferential surface is provided with multiple mounting positions for mounting the tool holder at equal intervals; The auxiliary support component (3) includes a support ring (31), a pneumatic telescopic rod (32), and an air source component (33); the support ring (31) is installed on the inner edge of the outer periphery of the tool holder (2) and is located beside the mounting position; at least two pneumatic telescopic rods (32) are grouped together, and multiple groups of pneumatic telescopic rods (32) correspond one-to-one with the mounting position and are installed on the ring surface of the support ring (31), and the movable end of the pneumatic telescopic rod (32) extends into the tool holder located in the mounting position; the air source component (33) is installed on the turret body (1) and is connected to the pneumatic telescopic rod (32) through the support ring (31).

2. The servo-powered turret tool holder assembly with automatic tool changing according to claim 1, characterized in that, The support ring (31) includes an inner ring (311), an outer ring (312), and a seal. The outer ring (312) is fitted around the outer circumference of the inner ring (311). The outer circumference of the inner ring (311) is concave to form an annular groove. The inner wall of the annular groove is provided with ventilation channels in the same number as the pneumatic telescopic rod (32) along its radial direction. Each ventilation channel extends to the air source interface in the direction of the corresponding pneumatic telescopic rod (32). Each ventilation channel is provided with a seal for sealing the ventilation channel. The pipeline port of the air source component (33) passes through the circumference of the outer ring (312) and communicates with the annular groove of the inner ring (311).

3. The servo-powered turret tool holder assembly with automatic tool changing according to claim 2, characterized in that, The sealing element includes a piston (313) and a connecting rod (314); the inner ring (311) has an axially outwardly opening movable channel at the vent passage, the end of the movable channel facing the air source (33); the connecting rod (314) extends from the movable channel into the vent passage and is connected to the piston (313), the size of the piston (313) is adapted to the cross section of the vent passage, the diameter of the connecting rod (314) is smaller than the diameter of the piston (313), and the piston (313) slides into the movable channel to maintain the continuity of the vent passage.

4. The servo-powered turret tool holder assembly with automatic tool changing according to claim 3, characterized in that, A limiting ring is provided on the inner wall of the moving channel of the inner ring (311) at the end opposite to the ventilation channel, and the connecting rod (314) passes through the limiting ring.

5. The servo-powered turret tool holder assembly with automatic tool changing according to claim 2, characterized in that, The edge of the outer ring (312) extends radially inward to cover the edge of the inner ring (311).

6. The servo-powered turret tool holder assembly with automatic tool changing according to claim 1, characterized in that, The air source component (33) consists of an exhaust pump and an intake pump, and is equipped with a switching valve for switching the intake and exhaust paths.

7. The servo-powered turret tool holder assembly with automatic tool changing according to claim 3, characterized in that, One end of the connecting rod (314) located outside the moving channel is fixed with an end block, the diameter of which is larger than the diameter of the moving channel.

8. The servo-powered turret tool holder assembly with automatic tool changing according to claim 1, characterized in that, The mounting position of the tool holder (2) is provided with a positioning groove that matches the concave and convex shape of the tool holder.

9. The servo-powered turret tool holder assembly with automatic tool changing according to claim 1, characterized in that, A keyway is provided at the center of the mounting position of the tool holder (2) to limit the installation direction of the tool holder.

10. The servo-powered turret tool holder assembly with automatic tool changing according to claim 1, characterized in that, A baffle (4) is engaged at the mounting position on the tool holder (2) where the tool post is not installed.

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