A double-tool-post active anti-collision protection device and double-tool-post lathe

Abstract

The utility model discloses a double knife rest initiative anti -collision protection device and double knife rest lathe, wherein the anti -collision protection device includes first function frame and second function frame, and the first function frame is set to the end face of first knife rest towards second knife rest, the second function frame is set to the end face of second knife rest towards first knife rest, and the inner chamber of second function frame is slidably provided with a lead block along the first direction, and the end of lead block away from the end face of first function frame is connected with the first limiting block through the first spring, and the first limiting block is slidably arranged in the inner chamber, and the second spring is arranged between the end of first limiting block away from the first spring and the inner end wall of inner chamber, the end of lead block away from the first limiting block extends the second function frame outward, and the baffle is arranged, and the projection of baffle along the first direction falls in the range of first function frame, the utility model is not easy to make first knife rest and second knife rest be destroyed, and prolongs the service life of double knife rest lathe.

Description

Technical Field

[0001] This utility model relates to the field of lathe protection technology, specifically to a double-tool post active anti-collision protection device and a double-tool post lathe. Background Technology

[0002] Currently, most CNC vertical lathes, CNC gantry milling machines, and vertical machining centers in my country have a double-tool post structure. To prevent collisions between the double tool posts due to operator error, these machine tools are equipped with double-tool post anti-collision protection devices. Most current anti-collision protection devices use the following structure: two anti-collision brackets are installed at the end where the left and right tool posts are close together. Protective rubber pads are attached to the front of the two anti-collision brackets, and a stop block is placed at the front of the protective rubber pads. With this structure, when the left and right tool posts approach each other, the stop block collides first, then compresses the protective rubber pads as a buffer to reduce damage to the tool posts.

[0003] However, the aforementioned double tool post anti-collision protection device does not effectively buffer and absorb the energy generated by the impact during a collision. In particular, when the left and right tool posts approach each other at a relatively high speed, the components of the tool post structure are easily damaged, which seriously affects the service life of the lathe. Utility Model Content

[0004] In view of this, the present invention provides a dual-tool post active anti-collision protection device and a dual-tool post lathe to solve the problem that existing dual-tool post active anti-collision protection devices cannot effectively buffer and absorb the energy generated by the impact during a collision, which easily damages the components of the tool post structure and seriously affects the service life of the lathe.

[0005] In a first aspect, this utility model provides a dual-tool post active anti-collision protection device, applied to a dual-tool post lathe. The dual-tool post lathe includes a first tool post and a second tool post that can move closer to and further away from each other along a first direction. The dual-tool post active anti-collision protection device includes:

[0006] The first functional frame is located on the end face of the first tool post facing the second tool post;

[0007] A second functional frame is disposed on the end face of the second tool holder facing the first tool holder. A guide block is slidably disposed in the inner cavity of the second functional frame along a first direction. The end face of the guide block opposite to the first functional frame is connected to a first limiting block by a first spring. The first limiting block is slidably disposed in the inner cavity. A second spring is disposed between the end face of the first limiting block opposite to the first spring and the inner end wall of the inner cavity. One end of the guide block opposite to the first limiting block extends outside the second functional frame and is provided with a stop block. The projection of the stop block along the first direction falls within the range of the first functional frame.

[0008] The active anti-collision protection device for a double-blade holder according to this utility model has at least the following beneficial effects:

[0009] By sequentially arranging a guide block, a first spring, a first limiting block, and a second spring along the first direction within the inner cavity of the second functional frame, a series structure is formed. When the first tool post and the second tool post approach each other, causing the first functional frame to collide with the impact block, the guide block will gradually move to compress the first spring. The force is then transmitted through the first spring to the first limiting block, which in turn gradually moves to compress the second spring. The energy generated by the collision impact force is effectively absorbed by the first and second springs being compressed step by step along the first direction. This helps to reduce the damage to the first and second tool posts caused by the instantaneous impact force at the moment of contact. As a result, the impact force borne by the first functional frame when the first tool post and the second tool post approach each other at a relatively fast speed and collide with the impact block is reduced, making it less likely for the first and second tool posts to be damaged. This extends the service life of the double-tool post lathe equipped with this double-tool post active anti-collision protection device.

[0010] In one optional embodiment, the end of the second spring facing away from the first limiting block is connected to a second limiting block, the second limiting block is slidably disposed in the inner cavity, and a third spring is disposed between the end face of the second limiting block facing away from the first limiting block and the inner end wall of the inner cavity.

[0011] In one optional embodiment, the end of the inner cavity facing the first functional frame extends through the second functional frame, and the open end of the inner cavity is covered with a cover plate. The cover plate is detachably connected to the second functional frame, and the cover plate is provided with a through hole for the end of the guide block opposite to the first limiting block to pass through.

[0012] In one alternative embodiment, the guide block and the impact block are connected by a connecting rod, which is detachably connected to the guide block; the through hole is for the connecting rod to pass through.

[0013] In one optional embodiment, the outer wall of the end of the connecting rod facing the lead block is provided with a first threaded portion, and the end face of the lead block facing the connecting rod is provided with a first threaded hole, the first threaded hole matching the first threaded portion.

[0014] In one optional embodiment, a contact-type stroke sensor is provided on the outer wall of the second functional frame. The contact-type stroke sensor is electrically connected to an emergency stop switch, which is used to control the drive source of the first tool post and the second tool post. An elongated groove is formed in the wall of the inner cavity, and the elongated groove is arranged along a first direction. One side of the guide block extends through the elongated groove to the outside of the second functional frame and is provided with an abutment block, which is used to contact the contact-type stroke sensor and trigger the contact-type stroke sensor.

[0015] In one alternative embodiment, the elongated groove extends through the second functional frame at one end facing the first functional frame in a first direction;

[0016] And / or, the contact-type travel sensor is electrically connected to an audible and visual alarm.

[0017] In one optional embodiment, the impact block is configured as a buffer rubber block, the buffer rubber block having a stepped hole extending through it in a first direction, the stepped hole being for the connecting rod to pass through, the larger diameter end of the stepped hole being located at the end of the stepped hole facing away from the second functional frame; a limiting boss is provided on the end face of the connecting rod facing the first functional frame, and a nut is threadedly connected to the portion of the connecting rod on the buffer rubber block relatively close to the second functional frame; when the connecting rod is assembled with the buffer rubber block, the limiting boss is located inside the larger diameter end of the stepped hole and abuts against the end face of the buffer rubber block facing away from the second functional frame, and the nut abuts against the end face of the buffer rubber block facing the second functional frame.

[0018] In one alternative embodiment, an anti-collision rubber pad is provided at one end of the first functional frame facing the second functional frame, and the projection of the impact block along the first direction falls within the range of the anti-collision rubber pad.

[0019] Secondly, this utility model also provides a double-tool post lathe, including the double-tool post active anti-collision protection device provided in the first aspect above.

[0020] Since double-post lathes include a double-post active anti-collision protection device, which has the same beneficial effects as the double-post active anti-collision protection device, it will not be elaborated here. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of a dual-blade holder active anti-collision protection device according to this embodiment;

[0023] Figure 2 This is a cross-sectional front view schematic diagram of a dual-blade holder active anti-collision protection device according to this embodiment;

[0024] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 A partial structural diagram;

[0026] Figure 5 This is a bottom view of the structure of a dual-blade holder active anti-collision protection device according to this embodiment.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100 - First functional frame; 110 - Anti-collision rubber pad;

[0029] 200-Second functional frame, 210-Inner cavity, 211-Long slot, 220-Cover plate, 221-Through hole;

[0030] 310-Lead block, 311-First threaded hole, 312-Abutting block, 320-First spring, 330-First limiting block, 340-Second spring, 350-Bumping block, 351-Stepped hole, 360-Second limiting block, 370-Third spring, 380-Connecting rod, 381-First threaded part, 382-Limiting boss, 383-Nut;

[0031] 400 - Contact-type travel sensor; 410 - Mounting base. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 embodiment 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 embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0035] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0036] According to a first aspect of the present invention, a dual-tool post active anti-collision protection device is provided, applied to a dual-tool post lathe. The dual-tool post lathe includes a first tool post and a second tool post that can move closer to and further away from each other along a first direction. The dual-tool post active anti-collision protection device includes a first functional frame 100 and a second functional frame 200. The first functional frame 100 is disposed on the end face of the first tool post facing the second tool post; the second functional frame 200 is disposed on the end face of the second tool post facing the first tool post. A guide block 310 is slidably disposed in the inner cavity 210 of the second functional frame 200 along the first direction. The end face of the guide block 310 facing away from the first functional frame 100 is connected to a first limiting block 330 via a first spring 320. The first limiting block 330 is slidably disposed in the inner cavity 210. A second spring 340 is disposed between the end face of the first limiting block 330 facing away from the first spring 320 and the inner end wall of the inner cavity 210. One end of the guide block 310 facing away from the first limiting block 330 extends outside the second functional frame 200 and is provided with a bumper 350. The projection of the bumper 350 along the first direction falls within the range of the first functional frame 100.

[0037] In this embodiment, the dual-tool holder active anti-collision protection device consists of a guide block 310, a first spring 320, a first limiting block 330, and a second spring 340 arranged sequentially along a first direction in the inner cavity 210 of the second functional frame 200, forming a series structure. When the first tool holder and the second tool holder approach each other, causing the first functional frame 100 to collide with the impact block 350, the guide block 310 will gradually move and compress the first spring 320. The force is then transmitted from the first spring 320 to the first limiting block 330, gradually pushing the first limiting block 330 to move and compress the second spring 340. The two springs 340, by gradually compressing the first spring 320 and the second spring 340 along the first direction, effectively absorb the energy generated by the collision impact force. This helps to reduce the damage to the first tool post and the second tool post caused by the instantaneous impact force when they first collide. This effectively reduces the impact force borne by the first tool post and the second tool post when they approach each other at a relatively fast speed and collide with the first functional frame 100 and the impact block 350. It also makes it less likely for the first tool post and the second tool post to be damaged, and extends the service life of the double tool post lathe equipped with the double tool post active anti-collision protection device of this embodiment.

[0038] It is understandable that the first direction mentioned in the text refers to the axial direction of the inner cavity 210. For ease of description, it is referred to as... Figure 2 The first direction in the text is described as the first direction in the text.

[0039] It should be noted that the first functional holder 100 is connected to the first tool post by screws, and the second functional holder 200 is connected to the second tool post by screws; no major modifications to the double tool post lathe are required, and it has strong compatibility.

[0040] like Figure 2 and Figure 4 As shown, in some embodiments, the end of the second spring 340 away from the first limiting block 330 is connected to a second limiting block 360, the second limiting block 360 is slidably disposed in the inner cavity 210, and a third spring 370 is disposed between the end face of the second limiting block 360 away from the first limiting block 330 and the inner end wall of the inner cavity 210. By adding a second limiting block 360 and a third spring 370 between the second spring 340 and the inner end wall of the inner cavity 210, after the force is transmitted from the second spring 340 to the second limiting block 360, the second limiting block 360 will be gradually pushed to move and compress the third spring 370. The energy generated by the collision impact force is effectively absorbed by the first spring 320, the second spring 340 and the third spring 370 being compressed step by step along the first direction (specifically, at least 60% of the energy is absorbed), effectively reducing the impact damage by more than 60%. This ensures that when the first tool holder and the second tool holder approach each other at a relatively fast speed and the first functional frame 100 collides with the impact block 350, the impact force on the first tool holder and the second tool holder is not likely to damage the first tool holder and the second tool holder.

[0041] like Figures 2 to 4 As shown, in some embodiments, one end of the inner cavity 210 facing the first functional frame 100 passes through the second functional frame 200. The open end of the inner cavity 210 is covered with a cover plate 220, which is detachably connected to the second functional frame 200. The cover plate 220 is provided with a through hole 221, which is used for the end of the guide block 310 facing away from the first limiting block 330 to pass through. By passing one end of the inner cavity 210 through the second functional frame 200, and detachably connecting the cover plate 220 to the second functional frame 200, and using the cover plate 220 to cover the opening end of the inner cavity 210, the third spring 370, the second limiting block 360, the second spring 340, the first limiting block 330, the first spring 320, and the guide block 310 are sequentially installed in the inner cavity 210 to complete the assembly of the second functional frame 200, and to facilitate the opening of the cover plate 220, and the removal of the third spring 370, the second limiting block 360, the second spring 340, the first limiting block 330, the first spring 320, and the guide block 310 from the inner cavity 210 for maintenance; the entire disassembly and assembly process is simple to operate.

[0042] Specifically, the cover plate 220 has a through mounting hole for the locking screw to pass through, and the second functional bracket 200 has a second threaded hole corresponding to the mounting hole, which is threadedly connected to the locking screw. This arrangement facilitates the assembly and disassembly of the cover plate 220 and the second functional bracket 200.

[0043] like Figures 2 to 4 As shown, in some embodiments, the guide block 310 and the impact block 350 are connected by a connecting rod 380, which is detachably connected to the guide block 310; the through hole 221 is used for the connecting rod 380 to pass through. By detachably connecting the connecting rod 380 to the guide block 310, when at least one of the connecting rod 380 or the impact block 350 is damaged after long-term use, the connecting rod 380 and the impact block 350 can be removed together for repair or replacement, reducing maintenance costs.

[0044] Specifically, the connecting rod 380 has a first threaded portion 381 on its outer side wall facing the guide block 310, and the guide block 310 has a first threaded hole 311 on its end face facing the connecting rod 380. The first threaded hole 311 matches the first threaded portion 381. When the connecting rod 380 and the guide block 310 need to be assembled as a whole, the first threaded portion 381 is simply threaded into the first threaded hole 311; when the connecting rod 380 and the guide block 310 need to be separated, the first threaded portion 381 is simply unscrewed from the first threaded hole 311. The entire operation is convenient.

[0045] In specific applications, the connecting rod 380 and the guide block 310 can also be detachably connected using other connection methods. For example, a mounting plate is provided at one end of the connecting rod 380 facing the guide block 310. The cross-sectional area of ​​the mounting plate perpendicular to the first direction is larger than the cross-sectional area of ​​the connecting rod 380 perpendicular to the first direction. The mounting plate is connected to the guide block 310 by screws.

[0046] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, a contact-type stroke sensor 400 is provided on the outer wall of the second functional frame 200. The contact-type stroke sensor 400 is electrically connected to an emergency stop switch, which is used to control the drive source of the first tool post and the second tool post. An elongated groove 211 is provided in the wall of the inner cavity 210, and the elongated groove 211 is arranged along a first direction. One side of the guide block 310 extends through the elongated groove 211 to the outside of the second functional frame 200 and is provided with an abutment block 312. The abutment block 312 is used to contact the contact-type stroke sensor 400 and trigger the contact-type stroke sensor 400. By providing an elongated groove 211 in the wall of the inner cavity 210, one side of the guide block 310 extends through the elongated groove 211 to the outside of the second functional frame 200 to install an abutment block 312. This allows the contact stroke sensor 400 to be triggered when the first tool post and the second tool post approach each other to a dangerous distance, based on the installation of the contact stroke sensor 400 on the outer wall of the second functional frame 200. This ensures that the contact stroke sensor 400 can be triggered when the first tool post and the second tool post approach each other to a dangerous distance, and transmits a signal to the emergency stop switch. The emergency stop switch forces the drive source (such as an electric motor) driving the first tool post and the second tool post to brake, effectively reducing the risk of crushing accidents between the first or second tool post and the protective cover, and ensuring the safe operation of the double tool post lathe equipped with the double tool post active anti-collision protection device of this embodiment.

[0047] It should be noted that the contact-type travel sensor 400 in this embodiment is installed on the outer side wall of the second functional frame 200, which facilitates the installation of the contact-type travel sensor 400 and the maintenance and replacement of the contact-type travel sensor 400.

[0048] like Figure 1 , Figure 2 and Figure 4 As shown, specifically, the outer wall of the second functional frame 200 is provided with a mounting base 410, and the contact type stroke sensing sensor 400 is connected to the mounting base 410 by screws.

[0049] Specifically, the contact-type travel sensor 400 is electrically connected to an audible and visual alarm. When the first tool post and the second tool post approach each other, causing the first functional frame 100 to collide with the impact block 350 and push the guide block 310 to move along the first direction until the contact block 312 contacts and triggers the contact-type travel sensor 400, the audible and visual alarm can emit an alarm sound to intuitively remind the operator and facilitate timely intervention.

[0050] In practical applications, the contact travel sensor 400 is also electrically connected to a control system. When the contact travel sensor 400 is triggered once, the control system records a collision warning event, which makes it easy for operators to read the collision warning event record and thus facilitates the construction of a complete active collision avoidance protection system.

[0051] In some embodiments, the elongated groove 211 extends through the second functional frame 200 at one end facing the first functional frame 100 in a first direction. This arrangement facilitates the assembly of the integrally formed guide block 310 and abutment block 312 into the inner cavity 210 after the cover plate 220 is removed.

[0052] like Figure 3 and Figure 4 As shown, in some embodiments, the impact block 350 is configured as a buffer rubber block, and the buffer rubber block is provided with a stepped hole 351 through it in a first direction. The stepped hole 351 is used for the connecting rod 380 to move through it. The large-diameter end of the stepped hole 351 is located at the end of the stepped hole 351 opposite to the second functional frame 200. The end face of the connecting rod 380 facing the first functional frame 100 is provided with a limiting boss 382. The part of the connecting rod 380 located on the buffer rubber block that is relatively close to the second functional frame 200 is threadedly connected to a nut 383. When the connecting rod 380 is assembled with the buffer rubber block, the limiting boss 382 is located in the large-diameter end of the stepped hole 351 and abuts against the end face of the buffer rubber block opposite to the second functional frame 200. The nut 383 abuts against the end face of the buffer rubber block facing the second functional frame 200. With this configuration, if at least one of the connecting rod 380 or the impact block 350 is damaged after prolonged use, the connecting rod 380 can be removed from the guide block 310 first, and then the nut 383 can be removed from the connecting rod 380 to release the locking force on the impact block 350. This makes it easier to separate the impact block 350 and the connecting rod 380 into two independent parts and replace them accordingly, further reducing maintenance costs.

[0053] It should be noted that in this embodiment, the impact block 350 is set as a buffer rubber block. The elastic compressibility of the buffer rubber block further absorbs the energy generated by the collision between the first functional frame 100 and the impact block 350. This is more conducive to reducing the impact force borne by the first tool holder and the second tool holder when they approach each other at a faster speed and the first functional frame 100 collides with the impact block 350.

[0054] Specifically, a second threaded portion is provided on the outer peripheral surface of the connecting rod 380, located on the buffer rubber block relatively close to the second functional frame 200. The second threaded portion matches the nut 383, and the nut 383 is clearance-fitted with the connecting rod 380. This arrangement reduces the processing difficulty and cost by providing the second threaded portion only at a localized location on the connecting rod 380. Simultaneously, the clearance fit between the nut 383 and the connecting rod 380 facilitates the removal of the nut 383 from the connecting rod 380 after unscrewing it from the second threaded portion.

[0055] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, a shock-absorbing rubber pad 110 is provided at one end of the first functional frame 100 facing the second functional frame 200, and the projection of the impact block 350 along the first direction falls within the range of the shock-absorbing rubber pad 110. The elastic compressibility of the shock-absorbing rubber pad 110 further absorbs the energy generated by the collision between the first functional frame 100 and the impact block 350, which is more conducive to reducing the impact force experienced when the first tool holder and the second tool holder approach each other at a relatively high speed and collide with the first functional frame 100 and the impact block 350.

[0056] Specifically, the anti-collision rubber pad 110 is connected to the first functional frame 100 by screws.

[0057] like Figures 1 to 5As shown, according to a second aspect of the present invention, a double-tool-post lathe is also provided, including the double-tool-post active anti-collision protection device provided in the first aspect of the present invention. In this embodiment, the double-tool-post active anti-collision protection device in the double-tool-post lathe forms a series structure by sequentially arranging a guide block 310, a first spring 320, a first limiting block 330, and a second spring 340 along a first direction in the inner cavity 210 of the second functional frame 200. When the first tool post and the second tool post approach each other, causing the first functional frame 100 to collide with the impact block 350, the guide block 310 is gradually pushed to move and compress the first spring 320. The force is then transmitted to the first limiting block 330 through the first spring 320, gradually pushing the first tool post... The limiting block 330 moves to compress the second spring 340. The first spring 320 and the second spring 340 are compressed step by step along the first direction to effectively absorb the energy generated by the collision impact force. This helps to reduce the damage to the first tool post and the second tool post caused by the instantaneous impact force when they first collide. This effectively reduces the impact force that the first tool post and the second tool post bear when they approach each other at a relatively fast speed and collide with the first functional frame 100 and the impact block 350. It makes it less likely that the first tool post and the second tool post will be damaged, thus extending the service life of the double tool post lathe in this embodiment.

[0058] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A dual-tool post active anti-collision protection device, applied to a dual-tool post lathe, the dual-tool post lathe comprising a first tool post and a second tool post that can move closer to and further away from each other along a first direction, characterized in that, The dual-tool holder active anti-collision protection device includes: The first functional frame (100) is disposed on the end face of the first tool post facing the second tool post; A second functional frame (200) is disposed on the end face of the second tool holder facing the first tool holder. A guide block (310) is slidably disposed in the inner cavity (210) of the second functional frame (200) along the first direction. The end face of the guide block (310) away from the first functional frame (100) is connected to a first limiting block (330) by a first spring (320). The first limiting block (330) is slidably disposed in the inner cavity (210). A second spring (340) is disposed between the end face of the first limiting block (330) away from the first spring (320) and the inner end wall of the inner cavity (210). One end of the guide block (310) away from the first limiting block (330) extends outside the second functional frame (200) and is provided with a stop block (350). The projection of the stop block (350) along the first direction falls within the range of the first functional frame (100).

2. The dual-tool holder active anti-collision protection device according to claim 1, characterized in that, The second spring (340) is connected to a second limiting block (360) at one end away from the first limiting block (330). The second limiting block (360) is slidably disposed in the inner cavity (210). A third spring (370) is disposed between the end face of the second limiting block (360) away from the first limiting block (330) and the inner end wall of the inner cavity (210).

3. A dual-tool holder active anti-collision protection device according to claim 1 or 2, characterized in that, The inner cavity (210) extends through the second functional frame (200) at one end facing the first functional frame (100). The opening end of the inner cavity (210) is covered with a cover plate (220). The cover plate (220) is detachably connected to the second functional frame (200). The cover plate (220) is provided with a through hole (221). The through hole (221) is used for the end of the guide block (310) facing away from the first limiting block (330) to pass through.

4. The dual-tool holder active anti-collision protection device according to claim 3, characterized in that, The guide block (310) and the impact block (350) are connected by a connecting rod (380), which is detachably connected to the guide block (310); the through hole (221) is used for the connecting rod (380) to pass through.

5. The dual-tool holder active anti-collision protection device according to claim 4, characterized in that, The connecting rod (380) has a first threaded portion (381) on the outer side wall of one end facing the guide block (310), and the guide block (310) has a first threaded hole (311) in the end face facing the connecting rod (380), and the first threaded hole (311) matches the first threaded portion (381).

6. The dual-tool holder active anti-collision protection device according to claim 3, characterized in that, The outer wall of the second functional frame (200) is provided with a contact stroke sensor (400), which is electrically connected to an emergency stop switch. The emergency stop switch is used to control the drive source of the first tool post and the second tool post. The inner cavity (210) is provided with an elongated groove (211) in the surrounding wall. The elongated groove (211) is arranged along a first direction. One side of the guide block (310) extends through the elongated groove (211) to the outside of the second functional frame (200) and is provided with an abutment block (312). The abutment block (312) is used to contact the contact stroke sensor (400) and trigger the contact stroke sensor (400).

7. The dual-tool holder active anti-collision protection device according to claim 6, characterized in that, The elongated groove (211) extends through the second functional frame (200) at one end along the first direction toward the first functional frame (100); And / or, the contact travel sensor (400) is electrically connected to an audible and visual alarm.

8. The dual-tool holder active anti-collision protection device according to claim 4, characterized in that, The impact block (350) is configured as a buffer rubber block, and the buffer rubber block is provided with a stepped hole (351) through it in the first direction. The stepped hole (351) is used for the connecting rod (380) to move through. The large-diameter end of the stepped hole (351) is located at the end of the stepped hole (351) away from the second functional frame (200). The end face of the connecting rod (380) facing the first functional frame (100) is provided with a limiting boss (382). The part of the connecting rod (380) located on the buffer rubber block that is relatively close to the second functional frame (200) is threaded with a nut (383). When the connecting rod (380) is assembled with the buffer rubber block, the limiting boss (382) is located in the large-diameter end of the stepped hole (351) and abuts against the end face of the buffer rubber block away from the second functional frame (200). The nut (383) abuts against the end face of the buffer rubber block facing the second functional frame (200).

9. The dual-tool holder active anti-collision protection device according to claim 1, characterized in that, The first functional frame (100) is provided with an anti-collision rubber pad (110) at one end facing the second functional frame (200), and the projection of the impact block (350) along the first direction falls within the range of the anti-collision rubber pad (110).

10. A double-tool-post lathe, characterized in that, Includes the dual-blade active anti-collision protection device according to any one of claims 1 to 9.

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