Multi-tool head rotary clamp for numerical control machining

Abstract

The application discloses a multi-tool-head rotary clamp for numerical control machining, which comprises a fixing base used for being mounted on a tool mounting table of a lathe, a rotary base rotatably arranged on the fixing base, a first locking mechanism arranged between the fixing base and the rotary base and used for restricting rotation of the rotary base, at least five tool clamping units arranged on the rotary base and arranged in an equiangular annular array with the rotary shaft of the rotary base as an axis, and each tool clamping unit can slide radially along the rotary base. The application solves the problems that the four-square tool holder has a small number of tool clamping and is not strong in general applicability for clamping different specifications of tools, and achieves the purpose of improving the general applicability and practicability of tool clamping.

Description

Technical Field

[0001] This invention relates to the field of CNC machining technology, and in particular to a multi-tool rotary fixture for CNC machining. Background Technology

[0002] Currently, CNC lathes are the most widely used tool post in the field of CNC machining. However, most CNC lathes have a square tool post, which can only hold a maximum of 4 tools at a time. Due to its limited practicality, operators often only clamp one tool. After the tool wears out, it is removed and sharpened on a grinding wheel. After sharpening, it is clamped again. This operation reduces work efficiency. Therefore, it is of great significance to design a more practical multi-tool head flipping fixture that can adapt to different specifications and sizes. Summary of the Invention

[0003] To address the aforementioned deficiencies in the prior art, the present invention aims to provide a multi-tool rotating fixture for CNC machining, thereby solving the problems of the existing square tool holder having a small number of tools that can be clamped and poor versatility for clamping tools of different specifications, thus achieving the goal of improving the versatility and practicality of tool clamping.

[0004] The present invention is achieved through the following technical solution.

[0005] According to one aspect of the present invention, a multi-tool rotary fixture for CNC machining is provided, comprising:

[0006] A mounting bracket for mounting on the tool mounting table of a lathe;

[0007] A rotating base, rotatably mounted on a fixed base;

[0008] The first locking mechanism is located between the fixed seat and the rotating seat to constrain the rotation of the rotating seat;

[0009] The tool clamping unit has at least 5 units, which are mounted on a rotary table and arranged in an equiangular ring array with the rotation axis of the rotary table as the axis; each tool clamping unit can slide along the circumference of the rotary table.

[0010] Preferably, the tool clamping unit includes:

[0011] The first clamping block is slidably connected to the rotating seat;

[0012] The second clamping block is disposed opposite to the first clamping block and is slidably connected to the rotating seat, and can slide relative to the first clamping block;

[0013] A drive mechanism is provided on the first clamping block and the second clamping block, and is used to drive the first clamping block and the second clamping block to move synchronously in opposite directions;

[0014] The third clamping block is located between the first clamping block and the second clamping block, and is slidably connected to the first clamping block and the second clamping block, and the sliding direction is perpendicular to the sliding direction of the first clamping block and the second clamping block.

[0015] The second locking mechanism is disposed on the first clamping block and the second clamping block, and is used to lock the sliding of the third clamping block;

[0016] The pushing mechanism is slidably disposed between the first clamping block and the second clamping block, and the base of the pushing mechanism is fixedly connected to the rotating seat. The pushing mechanism reciprocates along the axial direction of the first clamping block and the second clamping block to clamp the cutting tool.

[0017] Preferably, the drive mechanism includes: a positive and negative screw and a first locking nut assembly;

[0018] The positive and negative screws pass through the first clamping block and the second clamping block respectively, and are threaded to the rear ends of the first clamping block and the second clamping block. They are locked by the first locking nut assembly, so that the first clamping block and the second clamping block move synchronously towards each other or away from each other, and the tool is clamped in a centering manner.

[0019] Preferably, the lower end faces of the first clamping block and the second clamping block are each fixedly provided with two T-shaped sliders, which are used to cooperate with the first T-shaped groove opened on the surface of the rotating seat and slide along the circumference of the rotating seat.

[0020] Preferably, the third clamping block includes a main board and an ear plate, wherein the ear plate is telescopically mounted on both sides of the main board; both the first clamping block and the second clamping block are provided with sliding cavities, and the ear plate can slide up and down within the sliding cavities.

[0021] Preferably, the second locking mechanism includes: a second screw, a second locking nut assembly, and several pads. The second screw passes through the slide cavity and the ear plate and is fixedly connected to the bottom end of the slide cavity. The pads are sleeved on the second screw.

[0022] Preferably, the pushing mechanism includes: a base, a third screw, a push block and a third locking nut assembly. The base is fixedly connected to the rotating seat, the third screw passes through the base and is threadedly connected to the base, one end of the third screw is rotatably connected to the push block, the push block is axially slidably connected along the first clamping block and the second clamping block, and the third locking nut assembly is threadedly connected to the third screw and presses against the base.

[0023] Preferably, a second T-shaped groove is formed along the axial direction on the lower part of the inner surface of the first clamping block and the second clamping block, and the two sides of the push block have a T-shaped structure that matches the second T-shaped groove; the third screw rotates along the push block, and the push block is pushed to contact the rear end face of the tool.

[0024] Preferably, the device also includes locking screws that pass through the front ends of the first clamping block and the second clamping block, respectively.

[0025] Preferably, the first locking mechanism includes: a pawl and a bolt;

[0026] Multiple first slots are arranged in a ring array on the side of the rotating base, and at least two second slots are arranged symmetrically on the fixed base. Multiple locking strips are arranged in a ring array on the lower surface of the rotating base, and multiple third slots are arranged in a ring array on the upper surface of the fixed base. The third slots and locking strips engage with each other. When the third slots and locking strips engage with each other, the first slots are directly above the second slots, and the claws can be inserted into the first and second slots.

[0027] There are at least two bolts, which respectively pass through the jaws and are threadedly connected to the rotating seat and the fixed seat.

[0028] The present invention, by adopting the above technical solution, has the following beneficial effects:

[0029] The multi-tool rotary fixture for CNC machining provided by this invention can connect and fix an existing lathe tool post to a rotary table through the setting of a fixed base; the relative rotation of the rotary table and the fixed base can realize the rotation of the tool; by installing at least five tool clamping units on the rotary table, the tool can be clamped and fixed, and multiple tool heads can be set; the setting of a first locking structure can constrain the rotation of the rotary table, thereby further realizing the overall stability of the fixture during machining. Thus, it effectively solves the problems of the existing four-square tool post having a small number of tools that can be clamped and poor versatility for clamping tools of different specifications, achieving the goal of improving the versatility and practicality of tool clamping.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is a three-dimensional structural diagram of the multi-tool rotary fixture for CNC machining provided by the present invention;

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the tool clamping unit from one perspective provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the tool clamping unit from another perspective provided by the present invention;

[0035] Figure 4 This is a three-dimensional structural diagram of the positive and negative screw and the first locking nut assembly provided by the present invention;

[0036] Figure 5 This is a top view schematic diagram of the tool clamping unit provided by the present invention;

[0037] Figure 6 This is a schematic diagram of the axial cross-sectional structure of the tool clamping unit provided by the present invention;

[0038] Figure 7 This is a schematic diagram showing the setting position of the first locking mechanism provided by the present invention;

[0039] Figure 8 This is a schematic diagram showing the opening position of the first T-shaped slide groove of the rotary seat provided by the present invention;

[0040] Figure 9 This is a three-dimensional structural diagram of the multi-tool rotating fixture for CNC machining provided by the present invention after clamping the tool.

[0041] Figure label:

[0042] 1. Fixing base; 101. Second slot; 102. Third slot;

[0043] 2. Rotary seat; 201. First slot; 202. Locking strip; 203. First T-shaped slide groove;

[0044] 3. First locking mechanism; 301. Claw; 302. Bolt;

[0045] 4. Tool clamping unit;

[0046] 401, First clamping block; 4011, Sliding cavity; 4012, Second T-shaped sliding groove;

[0047] 402. Second clamping block;

[0048] 403, Third clamping block; 4031, Main board; 4032, Ear plate;

[0049] 404. Drive mechanism; 4041. Positive and negative screws; 4042. First locking nut assembly; 4043. First threaded section; 4044. Second threaded section;

[0050] 405. Second locking mechanism; 4051. Second screw; 4052. Second locking nut assembly; 4053. Pad;

[0051] 406. Pushing mechanism; 4061. Base; 4062. Third screw; 4063. Push block;

[0052] 407. Locking screw;

[0053] 5. Lathe tool. Detailed Implementation

[0054] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0055] The following is combined with Figures 1 to 9 The illustrated embodiment describes the technical solution of a multi-tool rotary fixture for CNC machining according to the present invention: wherein, as shown in the embodiment... Figure 1 As shown, it includes: a fixed base 1, a rotating base 2, a first locking mechanism 3, and a tool clamping unit 4. The fixed base 1 is mounted on the tool mounting table of the lathe; the rotating base 2 is rotatably mounted on the fixed base 1; the first locking mechanism 3 is disposed between the fixed base 1 and the rotating base 2 to constrain the rotation of the rotating base 2; at least five tool clamping units 4 are provided, disposed on the rotating base 2, and are distributed in an equiangular ring array with the rotation axis of the rotating base 2 as the axis.

[0056] Figure 1 The example illustrates a specific structure of a multi-tool rotary fixture for CNC machining, wherein eight tool clamping units 4 are provided, and all are equally distributed around the rotation axis of the rotary seat 2; the rotary seat 2 is rotatably mounted to the fixed seat 1 via a rotating shaft, and the fixed seat 1 is fixedly mounted on the tool post of the lathe.

[0057] The multi-tool rotating fixture for CNC machining provided by this invention connects and fixes an existing lathe tool post to a rotating base 2 via a fixed base 1. The relative rotation of the rotating base 2 and the fixed base 1 allows for tool rotation. Installing at least five tool clamping units 4 on the rotating base 2 enables tool clamping and fixation, as well as the arrangement of multiple tool heads. The first locking structure 3 constrains the rotation of the rotating base 2, further enhancing the overall stability of the fixture during machining. This effectively solves the problems of limited tool clamping capacity and poor versatility for different tool specifications in existing square tool posts, thus improving the versatility and practicality of tool clamping.

[0058] The multi-tool rotary fixture for CNC machining provided in the embodiments of the present invention, such as Figures 2 to 5 As shown.

[0059] like Figure 2As shown, the tool clamping unit includes: a first clamping block 401, a second clamping block 402, a drive mechanism 404, a pushing mechanism 406, a third clamping block 403, and a second locking mechanism 405. The first clamping block 401 and the second clamping block 402 are both rectangular metal blocks, arranged parallel to each other, and can slide relative to each other, together slidingly connected to the rotating base 2. The drive mechanism 404 passes through the first clamping block 401 and the second clamping block 402, and is used to drive the first clamping block 401 and the second clamping block 402. The second clamping block 402 moves synchronously in the opposite or opposite directions; the third clamping block 403 is located between the first clamping block 401 and the second clamping block 402, and is slidably connected to the first clamping block 401 and the second clamping block 402, and the sliding direction of the third clamping block 403 is perpendicular to the sliding direction of the first clamping block 401 and the second clamping block 402; the second locking mechanism 405 is respectively disposed on the first clamping block 401 and the second clamping block 402, and is used to lock the sliding of the third clamping block 403.

[0060] like Figure 3 , Figure 4 As shown, the drive mechanism 404 includes: a positive and negative screw 4041 and a first locking nut assembly 4042. The positive and negative screw 4041 has a first threaded section 4043 and a second threaded section 4044. The first threaded section 4043 and the second threaded section 4044 have opposite helical directions, equal helical angles, and equal pitches. The first threaded section 4043 is threadedly connected to the first clamping block 401, and the second threaded section 4044 is threadedly connected to the second clamping block 402. The first locking nut assembly 4042 is connected to the first threaded section 4043 and the second threaded section 4044 respectively, and both are located outside the first clamping block 401 and the second clamping block 402.

[0061] The working principle of the tool clamping unit is as follows: Figure 2 , Figure 3 and Figure 5 As shown, the lower end faces of the first clamping block 401 and the second clamping block 402 of the tool clamping unit are each fixedly welded with two T-shaped sliders for cooperating with the first T-shaped grooves 203 formed on the surface of the rotary seat 2. The first T-shaped grooves 203 are distributed circumferentially on the surface of the rotary seat 2. Figure 8As shown; under the constraint of the first T-shaped groove 203, the first clamping block 401 and the second clamping block 402 can move towards each other or away from each other; the two ends of the positive and negative screws 4041 in the drive mechanism 404 pass through the first clamping block 401 and the second clamping block 402 respectively, and are threadedly connected to the rear ends of the first clamping block 401 and the second clamping block 402, so that the first clamping block 401 and the second clamping block 402 move towards each other or away from each other synchronously. In this way, the tool can be clamped in a centering manner without having to consider whether the central axis of the tool is coincident with the central axis of the tool holder, and without having to adjust the tool. Even if there is a slight deviation, a metal shim can be added to the tool holder to make a fine adjustment of the tool's center.

[0062] like Figure 3 As shown, the pushing mechanism 406 is located behind the first clamping block 401 and the second clamping block 402. The pushing mechanism 406 is fixedly connected to the rotating seat 2, and the first clamping block 401 and the second clamping block 402 are slidably connected to both sides of the pushing mechanism 406.

[0063] like Figure 5 As shown, the pushing mechanism 406 includes: a base 4061, a third screw 4062, a push block 4063, and a third locking nut assembly (not shown in the figure). The base 4061 is fixedly connected to the rotating seat 2, either by welding or by bolt assembly 302. The third screw 4062 passes through the base 4061 axially along the first clamping block 401 and the second clamping block 402, and is threadedly connected to the base 4061. One end of the third screw 4062 is rotatably connected to the push block 4063, which can be pushed forward or pulled back under the action of the third screw 4062. The push block 4063 is slidably connected to the first clamping block 401 and the second clamping block 402, and can reciprocate along the axial direction of the first clamping block 401 and the second clamping block 402. The third locking nut assembly is threaded onto the third screw 4062 and can press against the rear side of the base 4061.

[0064] This design is intended to better support and fix the tool. When the tool is working, it will vibrate. It is difficult to ensure that the tool does not move back and forth by relying solely on the clamping force of the first clamping block and the second clamping block. The push block 4063 solves the problem of the tool moving backward. Of course, the push block is always slidably connected to the first clamping block and the second clamping block.

[0065] In this embodiment, the sliding structure of the pusher 4063 is as follows: Figure 6As shown, a second T-shaped groove 4012 is formed axially on the lower part of the inner surface of the first clamping block and the second clamping block. The two wings of the push block 4063 have a T-shaped structure, which can be installed in conjunction with the second T-shaped groove 4012. When the third screw 4062 is rotated, the push block 4063 is pushed until it contacts the rear end face of the tool.

[0066] like Figure 3 As shown, locking screws 407 are respectively passed through the front ends of the first clamping block 401 and the second clamping block 402. The locking screws 407 are provided with a fourth locking nut assembly (not shown in the figure), and the fourth locking nut assembly is located on the outside of the first clamping block 401 and the second clamping block 402. This arrangement is to form a clamping and force balance with the drive mechanism 404 for the tool.

[0067] The multi-tool rotary fixture for CNC machining provided in the embodiments of the present invention, such as Figure 5 and Figure 6 As shown:

[0068] The third clamping block 403 includes a main board 4031 and ear plates 4032, both of which are made of steel. There are an even number of ear plates 4032, with several pairs of ear plates 4032 symmetrically and telescopically mounted on both sides of the main board 4031. Correspondingly, both the first clamping block 401 and the second clamping block 402 have sliding cavities 4011, allowing the ear plates 4032 to slide up and down within the sliding cavities 4011.

[0069] The second locking mechanism 405 includes: a second screw 4051, a second locking nut assembly 4052, and a plurality of pads 4053. The number of second screws 4051 is the same as the number of ear plates 4032, and the number of second locking nuts is the same as the number of second screws 4051. The second screws 4051 pass through the slide cavity 4011 and are fixedly connected to the bottom end of the ear plates 4032. The pads 4053 are sleeved on the second screws 4051. The ear plates 4032 are located between the pads 4053.

[0070] The working principle of the third clamping block 403 and the second locking mechanism 405 is as follows: the ear plate 4032 of the third clamping block 403 is partially inserted into the side of the main board 4031 and can extend and retract within a certain range to respond to the sliding of the clamping block. The insertion end of the ear plate has a limiting structure with the main board to ensure that the ear plate is not pulled out, or when the third clamping block 403 is in the maximum separation position, the ear plate is still partially inserted into the main board to ensure the integrity of the third clamping block.

[0071] The mainboard 4031 primarily applies downward pressure to the cutting tool. The ear plate 4032 is located within the sliding cavity 4011. A second screw 4051 is vertically fixed within the sliding cavity 4011. Multiple washers are fitted onto the second screw 4051. The thickness of these washers can be adjusted according to the thickness of the cutting tool to ensure that the upper surface of the cutting tool is flush with the upper surface of the washers. This provides support for the downward pressure on the ear plate 4032, preventing deformation. It is important to note that the ear plate 4032 must be positioned between the washers, with the washers located on the upper surface of the ear plate 4032... The pad can increase the force application area on the ear plate 4032, thereby reducing the pressure. A second locking nut assembly 4052 is threaded on the upper part of the pad. The locking nut applies downward pressure to the third clamping block 403 as a whole, thereby locking the third clamping block 403. A pressure plate is also provided on the upper part of the second screw 4051. The pressure plate spans the upper opening of the slide cavity 4011 and is fixed by the bolt 302 assembly. The function of the pressure plate is to stabilize the second screw 4051 and prevent it from swaying due to vibration during operation.

[0072] The multi-tool rotary fixture for CNC machining provided in the embodiments of the present invention, such as Figure 1 and Figure 7-9 As shown: The first locking mechanism 3 includes: a claw 301 and a bolt 302. Multiple first slots 201 are arranged in a ring array on the side of the rotating seat 2. At least two second slots 101 are symmetrically arranged on the fixed seat 1. Multiple locking strips 202 are arranged in a ring array on the lower surface of the rotating seat 2. Multiple third slots 102 are arranged in a ring array on the upper surface of the fixed seat 1. The third slots 102 and the locking strips 202 engage with each other. When the third slots 102 and the locking strips 202 engage with each other, the first slots 201 are directly above the second slots 101, and the claws 301 can be inserted into the first slots 201 and the second slots 101. There are at least two bolts 302, which respectively pass through the claws 301 and are threadedly connected to the rotating seat 2 and the fixed seat 1.

[0073] Figure 7An example of a specific structure of a first locking mechanism 3 is provided, wherein the pawl 301 is "[" shaped, and two through holes are provided on its connecting plate. Bolts 302 are installed in the through holes, and the bolts 302 are threaded to the side of the rotating seat 2 and the side of the fixed seat 1, respectively. Eight first slots 201 are provided at equal angles around the rotation axis on the side of the rotating seat 2, for engaging with the upper pawl of the pawl 301. Similarly, two second slots 101 are symmetrically provided on the side of the fixed seat 1, for engaging with the lower pawl of the pawl 301. When the rotating seat 2 rotates a certain angle, it can be locked by the pawl 301 and the bolts 302. To ensure stability during operation, eight third slots 102 are equally spaced on the upper surface of the rotary seat 2. Correspondingly, eight locking strips 202 are fixed on the lower surface of the rotary seat 2. The locking strips 202 and the third slots 102 correspond one-to-one. In this way, the rotary seat 2 can be lifted when the third locking mechanism is engaged or disengaged (a handle (not shown in the figure) can be installed at the center of the rotary seat 2). After rotating the angle, the third slots 102 and the locking strips 202 cooperate to quickly position and install the device. Then, the pawl 301 is installed. In this way, the conversion of multiple cutting heads can be realized, while ensuring the stability of the entire tool holder.

[0074] Figure 9 The image shows the clamping states of the eight cutting tools 5 with the tool clamping unit 4.

[0075] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A multi-tool rotary fixture for CNC machining, characterized in that, include: A mounting base (1) is used to mount the tool mounting table of a lathe; The rotating seat (2) is rotatably mounted on the fixed seat (1); The first locking mechanism (3) is disposed between the fixed seat (1) and the rotating seat (2) to constrain the rotation of the rotating seat (2); At least five tool clamping units (4) are provided and are arranged on the rotary seat (2) and are arranged in an equiangular ring array with the rotation axis of the rotary seat (2) as the axis; each tool clamping unit (4) can slide around the circumference of the rotary seat (2); The tool clamping unit (4) includes: The first clamping block (401) is slidably connected to the rotating seat (2); The second clamping block (402) is disposed opposite to the first clamping block (401) and is slidably connected to the rotating seat (2), and can slide relative to the first clamping block (401); A drive mechanism (404) is disposed on the first clamping block (401) and the second clamping block (402) for driving the first clamping block (401) and the second clamping block (402) to move synchronously in opposite or opposite directions; The third clamping block (403) is located between the first clamping block (401) and the second clamping block (402), and is slidably connected to the first clamping block (401) and the second clamping block (402), and the sliding direction is perpendicular to the sliding direction of the first clamping block (401) and the second clamping block (402); The second locking mechanism (405) is disposed on the first clamping block (401) and the second clamping block (402) for locking the sliding of the third clamping block (403); The pushing mechanism (406) is slidably disposed between the first clamping block (401) and the second clamping block (402), and the base (4061) of the pushing mechanism (406) is fixedly connected to the rotating seat (2). The pushing mechanism (406) reciprocates along the axial direction of the first clamping block (401) and the second clamping block (402) to clamp the tool.

2. The multi-tool rotating fixture for CNC machining according to claim 1, characterized in that, The drive mechanism (404) includes: a positive and negative screw (4041) and a first locking nut assembly (4042); the two ends of the positive and negative screw (4041) pass through the first clamping block (401) and the second clamping block (402) respectively, and are threadedly connected to the rear ends of the first clamping block (401) and the second clamping block (402), and are locked by the first locking nut assembly (4042), so that the first clamping block (401) and the second clamping block (402) move synchronously towards each other or away from each other, and perform centering clamping of the tool.

3. The multi-tool rotating fixture for CNC machining according to claim 1, characterized in that, The lower end faces of the first clamping block (401) and the second clamping block (402) are each fixedly provided with two T-shaped sliders, which are used to cooperate with the first T-shaped groove (203) opened on the surface of the rotating seat (2) and slide to connect with the rotating seat (2).

4. The multi-tool rotating fixture for CNC machining according to claim 1, characterized in that, The third clamping block (403) includes a main board (4031) and an ear plate (4032), wherein the ear plate (4032) is telescopically mounted on both sides of the main board (4031); the first clamping block (4011) and the second clamping block (402) are both provided with sliding cavities (4011), and the ear plate (4032) can slide up and down in the sliding cavity (4011).

5. The multi-tool rotating fixture for CNC machining according to claim 4, characterized in that, The second locking mechanism (405) includes: a second screw (4051), a second locking nut assembly (4052), and a plurality of pads (4053). The second screw (4051) passes through the slide cavity (4011) and the ear plate (4032) and is fixedly connected to the bottom end of the slide cavity (4011). The pads (4053) are sleeved on the second screw (4051).

6. The multi-tool rotating fixture for CNC machining according to claim 1, characterized in that, The pushing mechanism (406) includes: a base (4061), a third screw (4062), a push block (4063), and a third locking nut assembly. The base (4061) is fixedly connected to the rotating seat (2). The third screw (4062) passes through the base (4061) and is threadedly connected to the base (4061). One end of the third screw (4062) is rotatably connected to the push block (4063). The push block (4063) is slidably connected along the first clamping block (401) and the second clamping block (402). The third locking nut assembly is threadedly connected to the third screw (4062) and presses against the base (4061).

7. The multi-tool rotary fixture for CNC machining according to claim 6, characterized in that, A second T-shaped groove (4012) is formed along the axial direction on the lower part of the inner surface of the first clamping block (401) and the second clamping block (402). The two wings of the push block (4063) have a T-shaped structure that cooperates with the second T-shaped groove (4012). The third screw (4062) rotates along the push block (4063), and the push block (4063) is pushed to contact the rear end face of the tool.

8. The multi-tool rotary fixture for CNC machining according to claim 1, characterized in that, The first locking mechanism (3) includes: a pawl (301) and a bolt (302); Multiple first slots (201) are arranged in a ring array on the side of the rotating seat (2), and at least two second slots (101) are arranged symmetrically on the fixed seat (1). Multiple locking strips (202) are arranged in a ring array on the lower surface of the rotating seat (2), and multiple third slots (102) are arranged in a ring array on the upper surface of the fixed seat (1). The third slots (102) and the locking strips (202) engage with each other. When the third slots (102) and the locking strips (202) engage with each other, the first slots (201) are directly above the second slots (101), and the claws (301) can be inserted into the first slots (201) and the second slots (101). There are at least two bolts (302), which are threaded through the pawl (301) and the rotating seat (2) and the pawl (301) and the fixed seat (1), respectively.

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