Machine tool cutter assembly

Abstract

The utility model discloses a machine tool cutter assembly, which relates to the technical field of numerical control machine tools and comprises a base and a turning tool structure. The base comprises a straight plate part and an upper convex part, a sliding groove is formed in the upper surface of the straight plate part, an abutting part is arranged at the end, away from the upper convex part, of the sliding groove, and a V-shaped groove is formed between the side wall of the abutting part and the side wall of the sliding groove; the turning tool structure comprises a blade, a tool apron plate, a sliding block and a first linear driver. An inserting tip is arranged at the end part of the sliding block; and the inserting tip can be adaptively inserted and propped against the V-shaped groove. The first linear driver can push the tool apron plate to transversely move on the base in a reciprocating mode, and therefore the two blades arranged oppositely are driven to independently stretch out and retract. In the turning process, the state that one blade stretches out and the other blade retracts is kept, the problem that in the prior art, a boss-shaped structure collides with a blade in a non-working state can be solved, and the turning blade has better compatibility.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, specifically to a machine tool tool assembly. Background Technology

[0002] A CNC lathe is a type of CNC machine tool, typically used for turning workpieces such as bars.

[0003] To facilitate machining different shapes at different locations on the workpiece surface, lathe cutting tools typically have both forward and reverse cutting tools. Chinese patent "A Double-Ended Dual-Purpose Lathe Tool" (Publication No.: CN222569308U) discloses a technical solution that integrates forward and reverse cutting tools onto a single tool assembly. However, in actual machining, only one cutting tool is in operation. When one side of the target workpiece has a pre-machined boss-like structure, this boss-like structure will collide with the other cutting tool, causing the workpiece to be scrapped. Therefore, this type of technical solution has low compatibility with different workpiece shapes. Summary of the Invention

[0004] In order to overcome the problem in the above-mentioned background technology that "integrating the forward and reverse tools into a single tool assembly reduces machining compatibility", this utility model provides a machine tool assembly.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0006] A machine tool tool assembly includes a base and a turning tool structure. The base includes a straight plate portion and an upper protrusion disposed at one end of the upper surface of the straight plate portion. The upper surface of the straight plate portion is provided with a groove, and an abutment portion is provided at the end of the groove away from the upper protrusion. A V-shaped groove is provided between the sidewall of the abutment portion and the sidewall of the groove. The turning tool structure includes an insert, a tool holder plate, a slider, and a first linear actuator. The insert is fixedly connected to the tool holder plate. The tool holder plate is pressed against the upper surface of the straight plate portion. The slider is fixedly connected to the lower surface of the tool holder plate and is placed in the groove and slidably connected. One end of the first linear actuator is connected to the tool holder plate, and the other end is connected to the upper protrusion. The turning tool structure has two inserts arranged axially symmetrically, and the cutting edges of the two inserts are arranged in opposite directions. The end of the slider is provided with an insertion tip, which can be adapted to insert into and abut against the V-shaped groove.

[0007] As a further optimization of this utility model, the two V-shaped grooves are arranged in a dovetail shape.

[0008] As a further optimization of this utility model, the side wall of the end of the blade holder plate away from the upper protrusion is provided with an outer protrusion, and the blade is fixedly connected to the outer protrusion.

[0009] As a further optimization of this utility model, the two protruding parts are arranged in opposite directions.

[0010] As a further optimization of this utility model, within the same cutting tool structure, the extending direction of the external protrusion is the same as the cutting edge direction of the blade.

[0011] As a further optimization of this utility model, the cross-section of the abutting part is an isosceles triangle.

[0012] As a further optimization of this utility model, the upper protrusion is provided with a receiving groove, and the housing of the first linear driver is placed in the receiving groove and fixedly connected to the upper protrusion.

[0013] As a further optimization of this utility model, a sleeve is fixedly installed on the end face of the tool holder plate near the upper protrusion. A first pressure sensor is provided inside the sleeve, and the first pressure sensor is fixedly connected to the end face of the tool holder plate. An extended ring is provided at the end of the output shaft of the first linear driver near the tool holder plate, and the extended ring is inserted into the sleeve. An inner extended ring is provided at the end of the sleeve away from the tool holder plate to prevent the extended ring from falling out.

[0014] As a further optimization of this utility model, the sleeve sidewall is provided with a through hole for the wiring of the first pressure sensor.

[0015] As a further optimization of this utility model, a secondary groove is provided at the root of the V-shaped groove, and the V-shaped groove is connected to the secondary groove.

[0016] In summary, this utility model has at least one of the following advantages:

[0017] (1) The present invention has a simple structure and reliable function. The base is used to support the turning tool structure. The first linear driver can push the tool holder plate to move back and forth on the base. Both tool holder plates can extend and retract independently, thereby driving the two blades set in opposite directions to extend and retract independently. During turning operations, the present invention maintains the state of one blade extending and the other blade retracting, which can avoid the problem of collision between the boss-shaped structure and the non-working blade in the traditional technology. Therefore, the present invention can process workpieces with boss-shaped structures and has better compatibility.

[0018] (2) After the insertion tip of this utility model is pressed against the V-groove, the slider can be fixed in the horizontal direction, which can prevent the slider, tool holder plate and blade from shaking in the horizontal direction, thereby improving the machining accuracy.

[0019] (3) The first pressure sensor can detect the pressure between the insertion tip and the V-groove. When the pressure reaches or exceeds the preset value, the output shaft stops extending. This can ensure the stability of the slider pressing and avoid the problem of the first linear drive being overloaded and damaged.

[0020] (4) The second linear driver can push the pressing block so that the inclined end face of the pressing block presses against the inclined surface of the slider, and pulls the bottom surface of the tool holder plate to press against the top surface of the straight plate, so as to avoid longitudinal shaking of the slider, tool holder plate and tool, thereby improving the turning accuracy. Attached Figure Description

[0021] The present application will be further explained below with reference to the accompanying drawings:

[0022] Figure 1 This is a top-view schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the base structure from a top-angle view;

[0024] Figure 3 This is a top-view schematic diagram of the lathe tool structure;

[0025] Figure 4 This is a schematic diagram of the slider and tool holder plate structure viewed from an oblique angle.

[0026] Figure 5 This is a side view of the vertical section of the transverse hole structure;

[0027] Figure 6 This is a top-view schematic diagram of the cross section of the slider structure;

[0028] Figure 7 A schematic diagram showing the installation location of the second pressure sensor;

[0029] Figure 8 A side view of the fins connected to the upper protrusion.

[0030] Figure 9 This is a schematic diagram showing the installation location of the first pressure sensor;

[0031] Figure 10 This is a top view of the cross section of the sleeve structure;

[0032] Figure 11 Top view of the location of the secondary tank;

[0033] Figure 12 This is a schematic diagram showing the installation location and connection structure of the cover.

[0034] Explanation of reference numerals in the attached figures:

[0035] In the picture,

[0036] 1. Base; 11. Straight plate section; 111. Slide groove; 112. Abutment section; 113. V-groove; 114. Horizontal hole; 1141. Second linear actuator; 1142. Pressing block; 1143. Drive shaft; 1144. Second pressure sensor; 115. Secondary groove; 12. Upper protrusion; 121. Receiving groove;

[0037] 2. Tool structure; 21. Insert; 22. Tool holder plate; 221. Outer protrusion; 23. Slider; 231. Insertion tip; 24. First linear actuator; 241. Mounting fin; 242. Output shaft; 2421. Outer fin; 243. First pressure sensor; 244. Sleeve; 2441. Inner ring;

[0038] 3. Cover. Detailed Implementation

[0039] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0040] Reference Figure 1 This embodiment provides a machine tool assembly, including a base 1 and a turning tool structure 2. The base 1 supports the turning tool structure 2 and is connected to the machine tool's robotic arm or three-axis drive structure, thereby driving the turning tool structure 2 to move to meet the turning machining requirements.

[0041] Reference Figure 1 and Figure 2 The base 1 includes a straight plate portion 11 and an upper protrusion 12 disposed at one end of the upper surface of the straight plate portion 11. The upper protrusion 12 is fixedly connected to the straight plate portion 11 (e.g., by bolts or by an integral fixed connection). The upper surface of the straight plate portion 11 is provided with a groove 111, which is straight. The end of the groove 111 away from the upper protrusion 12 is provided with an abutment portion 112. A V-shaped groove 113 is provided between the sidewall of the abutment portion 112 and the sidewall of the groove 111. The abutment portion 112 is fixedly connected to the straight plate portion 11 (e.g., by bolts or by an integral fixed connection).

[0042] Reference Figures 1-4 The cutting tool structure 2 includes a cutting tool 21, a tool holder plate 22, a slider 23, and a first linear actuator 24. The cutting tool 21 is fixedly connected to the tool holder plate 22 (e.g., by bolts); the tool holder plate 22 is pressed against the upper surface of the straight plate portion 11 and can slide back and forth along the length direction of the slide groove 111. The slider 23 is fixedly connected to the lower surface of the tool holder plate 22 (e.g., by bolts or by an integral fixed connection). The slider 23 is placed in the slide groove 111 and is slidably connected; the cutting tool 21, the tool holder plate 22, and the slider 23 can slide back and forth synchronously along the length direction of the slide groove 111, that is, along the length direction of the base 1, thereby realizing the extension and retraction of the cutting tool 21.

[0043] Reference Figure 3 The first linear actuator 24 is connected at one end to the tool holder plate 22 and at the other end to the upper protrusion 12; the axis of the first linear actuator 24 is parallel to the length direction of the slide groove 111. The first linear actuator 24 can push the tool holder plate 22 to slide, thereby driving the blade 21 and the slider 23 to slide.

[0044] Reference Figure 1 and Figure 3 The lathe tool structure 2 has two blades arranged symmetrically on an axis, with the cutting edges of the two blades 21 facing opposite directions. Figure 3 Taking the shown perspective as an example, the cutting edge of the left-hand insert 21 is located on the left, and the cutting edge of the right-hand insert 21 is located on the right, thus enabling bidirectional turning. Since the two tool holders 22 can slide independently, the two inserts 21 can extend or retract independently.

[0045] Reference Figure 3 , Figure 4 and Figure 6 The slider 23 has an insertion tip 231 at its end, which can be inserted and abutted against the inner wall of the V-groove 113. When the slider 23 slides in the groove 111, a gap inevitably appears between the slider 23 and the groove 111. This gap will cause the slider 23, the tool holder plate 22, and the blade 21 to wobble in the horizontal direction, thereby reducing the machining accuracy. To avoid this problem, the insertion tip 231 of this utility model can fix the slider 23 in the horizontal direction after it abuts against the V-groove 113, thus avoiding the wobble (in the front-back and left-right directions) of the slider 23, thereby improving the machining accuracy.

[0046] Reference Figure 2 and Figure 6 The cross-section of the abutment portion 112 is an isosceles triangle. The two V-shaped grooves 113 are arranged in a dovetail shape and are axially symmetrical.

[0047] Reference Figure 2 and Figure 6 The outer wall of the contact portion 112 and the inner wall of the slide groove 111 form a V-shaped groove 113, that is, the two V-shaped grooves 113 are open rather than closed, thereby ensuring that a single insertion tip 231 can stably abut in a single V-shaped groove 113.

[0048] Reference Figure 5 The vertical cross-section of the slide groove 111 is in the shape of an isosceles trapezoid, with the long base of the isosceles trapezoid located at the bottom and the short base located at the top; the vertical cross-section of the slider 23 is in the shape of a right trapezoid and is adapted to one side of the slide groove 111. The two sliders 23 are set back to back, thereby ensuring that the sliders 23 cannot be longitudinally dislodged from the slide groove 111.

[0049] Reference Figure 5 Since the slider 23 needs to slide within the groove 111, a gap is inevitably required between the inclined surface of the slider 23 and the inclined surface of the groove 111. This gap will cause longitudinal wobble in the slider 23, the tool holder plate 22, and the tool, thereby reducing the turning accuracy. To avoid this problem, refer to... Figure 5 and Figure 7 The straight plate portion 11 has a transverse hole 114 inside, which is located on the side of the slide groove 111 and communicates with the slide groove 111. A second linear actuator 1141 is installed in the transverse hole 114. The housing of the second linear actuator 1141 is fixedly installed in the transverse hole 114 by bolts. The second linear actuator 1141 has a drive shaft 1143 that can extend and retract. A pressing block 1142 is installed at the end of the drive shaft 1143. The end face of the pressing block 1142 is inclined and adapted to the inclined surface of the slider 23. The second linear actuator 1141 can push the pressing block 1142, so that the inclined end face of the pressing block 1142 presses against the inclined surface of the slider 23, and pulls the bottom surface of the tool holder plate 22 to press against the top surface of the straight plate portion 11, so as to avoid longitudinal wobbling of the slider 23, the tool holder plate 22 and the tool, thereby improving the turning accuracy. (Refer to...) Figure 7 A second pressure sensor 1144 is fixedly mounted on the end of the drive shaft 1143 by bolts. The second pressure sensor 1144 is fixedly connected to the pressing block 1142 by bolts. The second pressure sensor 1144 can detect the pressure between the pressing block 1142 and the slider 23. When the pressure signal detected by the second pressure sensor 1144 reaches or exceeds the preset value, the drive shaft 1143 of the second linear actuator 1141 stops extending, thereby achieving stable pressing of the slider 23 and avoiding overload of the second linear actuator 1141.

[0050] Reference Figure 3 and Figure 4 The tool holder plate 22 has an outward protrusion 221 on the side wall of the end away from the upper protrusion 12, and the blade 21 is fixedly connected to the outward protrusion 221 by bolts. The outward protrusion 221 and the tool holder plate 22 are integrally fixedly connected.

[0051] Reference Figure 3 and Figure 4 The two protrusions 221 extend in opposite directions, and the two cutting tools 21 on the two protrusions 221 are used as forward and reverse cutting tools for turning operations.

[0052] Reference Figure 3 and Figure 4 Within the same cutting tool structure 2, the extension direction of the outer protrusion 221 is the same as the cutting edge direction of the blade 21, thereby achieving stable support of the blade 21 by the outer protrusion 221.

[0053] Reference Figure 2 , Figure 3 and Figure 8 The upper protrusion 12 is provided with a receiving groove 121. The housing of the first linear actuator 24 is placed in the receiving groove 121 and fixedly connected to the upper protrusion 12. The housing of the first linear actuator 24 is fixedly connected to the mounting fin 241 (e.g., by an integral fixed connection). The mounting fin 241 is fixedly connected to the upper protrusion 12 by bolts. The receiving groove 121 is strip-shaped and is used to apply a limiting force to the first linear actuator 24 to prevent the first linear actuator 24 from swinging and shaking, thereby achieving stable pressing of the slider 23 and the tool holder plate 22.

[0054] Reference Figure 9 and Figure 10 A sleeve 244 is fixedly installed on the end face of the tool holder plate 22 near the upper protrusion 12 (e.g., by bolts). A first pressure sensor 243 is provided inside the sleeve 244 and is fixedly connected to the end face of the tool holder plate 22 (e.g., by bolts). An extended ring is provided at the end of the output shaft 242 of the first linear actuator 24 near the tool holder plate 22. The extended ring is fixedly connected to the output shaft 242 (e.g., by bolts or by an integral connection) and is inserted into the sleeve 244. An inner extended ring 2441 is provided at the end of the sleeve 244 away from the tool holder plate 22 to prevent the extended ring from falling out. The sleeve 244 is fixedly connected to the inner extended ring 2441 (e.g., by bolts or by an integral connection). The end of the output shaft 242 and the extended ring can slide within the sleeve 244, that is, the end of the output shaft 242 and / or the extended ring can be pressed / separated from the first pressure sensor 243. When the output shaft 242 pushes the tool holder plate 22 and the slider 23, so that the insertion tip 231 abuts in the V-groove 113, the first pressure sensor 243 can reflect the pressure between the insertion tip 231 and the V-groove 113. When the pressure reaches or exceeds the preset value, the output shaft 242 stops extending, thus ensuring the stable pressing of the slider 23 and avoiding overload of the first linear driver 24.

[0055] The sleeve 244 has a wire hole on its side wall for the routing of the first pressure sensor 243.

[0056] The straight plate section 11 is provided with a wiring groove for the wiring of the second pressure sensor 1144.

[0057] Reference Figure 4 and Figure 11 The root of the V-groove 113 is provided with a secondary groove 115, and the V-groove 113 is connected to the secondary groove 115. The tip of the insertion tip 231 can be inserted into the secondary groove 115, so as to avoid the problem that the tip of the insertion tip 231 will not be able to fit tightly with the iron core after the accumulation of iron chips at the root of the V-groove 113, thereby improving the contact stability of the slider 23 and thus improving the turning accuracy.

[0058] Reference Figure 12 The present invention also includes a cover 3, which is fixedly installed on the upper surface or side of the straight plate portion 11. The edge of the cover 3 is fixedly connected to the straight plate portion 11 by bolts. The cover 3 is used to cover the slide groove 111 to prevent iron filings from flying into the slide groove 111 and causing the slider 23 to get stuck. The first linear actuator 24 is installed inside the cover 3, and the end of the tool holder plate 22 extends out from inside the cover 3, thereby ensuring the smooth movement of the tool holder plate 22.

[0059] Both the first linear actuator 24 and the second linear actuator 1141 are electric actuators, pneumatic actuators, hydraulic actuators, or combinations thereof (e.g., electro-hydraulic actuators).

[0060] This invention also includes an electrical cabinet, which is bolted and installed inside the machine tool's control box. The first linear driver 24, the second linear driver 1141, the first pressure sensor 243, and the second pressure sensor 1144 are connected to the electrical cabinet via wires and signal lines. The electrical cabinet is also connected to an external power supply and an external computer via wires and signal lines. The computer controls the start-up and shutdown of the first linear driver 24, the second linear driver 1141, the first pressure sensor 243, and the second pressure sensor 1144 through the electrical cabinet. The computer stores preset values ​​for comparison with the readings of the first pressure sensor 243 and the second pressure sensor 1144. These preset values ​​can be obtained by averaging a limited number of tests; further details are omitted here.

[0061] This invention has a simple structure and reliable function. The base 1 supports the cutting tool structure 2. The first linear driver 24 can push the tool holder plate 22 to reciprocate laterally on the base 1. Both tool holder plates 22 can extend and retract independently, thereby driving the two oppositely arranged cutting blades 21 to extend and retract independently. During turning operations, this invention maintains a state where one cutting blade 21 is extended and the other cutting blade 21 is retracted, which avoids the problem of collision between the boss-shaped structure and the non-working cutting blade 21 in the traditional technology. Therefore, this invention can process workpieces with boss-shaped structures and has high compatibility.

[0062] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this utility model based on its guidance, without departing from its principles and spirit, shall still fall within the protection scope of this utility model.

Claims

1. A machine tool assembly, characterised in that: It includes a base (1) and a cutting tool structure (2); The base (1) includes a straight plate (11) and an upper protrusion (12) disposed at one end of the upper surface of the straight plate (11). The upper surface of the straight plate (11) is provided with a sliding groove (111). The end of the sliding groove (111) away from the upper protrusion (12) is provided with an abutment (112). A V-shaped groove (113) is provided between the side wall of the abutment (112) and the side wall of the sliding groove (111). The lathe tool structure (2) includes a blade (21), a tool holder plate (22), a slider (23), and a first linear actuator (24); the blade (21) is fixedly connected to the tool holder plate (22); the tool holder plate (22) is pressed against the upper surface of the straight plate portion (11); the slider (23) is fixedly connected to the lower surface of the tool holder plate (22), and the slider (23) is placed in the slide groove (111) and slidably connected; one end of the first linear actuator (24) is connected to the tool holder plate (22), and the other end is connected to the upper protrusion (12); the lathe tool structure (2) has two blades arranged in an axially symmetrical manner, and the cutting edges of the two blades (21) are arranged in opposite directions; The slider (23) has an insertion tip (231) at its end, which can be adapted to insert and abut against the V-groove (113).

2. A machine tool assembly according to claim 1, characterised in that: The two V-shaped grooves (113) are arranged in a dovetail shape.

3. A machine tool assembly according to claim 2, wherein: The blade holder plate (22) has an outer protrusion (221) on the side wall of the end away from the upper protrusion (12), and the blade (21) is fixedly connected to the outer protrusion (221).

4. A machine tool assembly according to claim 3, wherein: The two protrusions (221) are arranged in opposite directions.

5. A machine tool assembly according to claim 4, wherein: Within the same cutting tool structure (2), the extension direction of the external protrusion (221) is the same as the cutting edge direction of the blade (21).

6. A machine tool assembly according to claim 5, wherein: The cross-section of the abutment portion (112) is an isosceles triangle.

7. A machine tool assembly according to claim 6, wherein: The upper protrusion (12) is provided with a receiving groove (121), and the housing of the first linear driver (24) is placed in the receiving groove (121) and fixedly connected to the upper protrusion (12).

8. The machine tool tool assembly according to claim 7, characterized in that: A sleeve (244) is fixedly installed on the end face of the tool holder plate (22) near the upper protrusion (12). A first pressure sensor (243) is provided inside the sleeve (244), and the first pressure sensor (243) is fixedly connected to the end face of the tool holder plate (22). An extended ring is provided at the end of the output shaft (242) of the first linear driver (24) near the tool holder plate (22), and the extended ring is inserted into the sleeve (244). An inner extended ring (2441) is provided at the end of the sleeve (244) away from the tool holder plate (22) to prevent the extended ring from falling out.

9. A machine tool assembly according to claim 8, wherein: The sleeve (244) has a wire hole on its side wall for the wiring of the first pressure sensor (243).

10. A machine tool assembly according to claim 9, wherein: The root of the V-shaped groove (113) is provided with a secondary groove (115), and the V-shaped groove (113) is connected to the secondary groove (115).

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