A down-pull vertical broaching machine lower chuck grab tool detection mechanism

Abstract

The utility model relates to a kind of lower pull vertical broaching machine lower chuck grab cutter detection mechanism, belong to numerical control lower pull vertical internal broaching machine technical field, including workbench, backing plate, lower slide, broach and lower chuck, the lower surface of the workbench is fixedly connected with sleeve compression block, the upper portion of the lower chuck is provided with grab cutter assembly, the grab cutter assembly includes sleeve, which is sleeved on the upper portion of lower chuck, the upper end surface of the sleeve is fixedly connected with multiple top rods, the lower end surface of the sleeve is fixedly connected with spring protection cover by backing plate.The lower pull vertical broaching machine lower chuck grab cutter detection mechanism, by integrating mechanical clamping mechanism and electronic detection system, the real-time monitoring of broach clamping state is realized, effectively prevent the tool damage accident caused by clamping failure, the sealing design of sensor protection cover ensures the reliability of detection system under harsh working conditions, and multi-stage limiting mechanism provides overload protection function, significantly improves the safety and service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of CNC vertical broaching machine technology, specifically a tool-gripping detection mechanism for the lower chuck of a vertical broaching machine. Background Technology

[0002] Vertical broaching machines, as efficient and precise metal cutting equipment, are widely used for machining various complex internal hole profiles. Their core working component, the chuck, typically employs a spring-loaded clamping mechanism to hold and release the broach.

[0003] The lower chuck of a pulldown broaching machine primarily relies on spring force to push the sleeve for clamping, but this method has significant drawbacks: First, it lacks real-time automatic detection of the broach's clamping or loosening status. When abnormal conditions occur during production, such as the lower chuck failing to clamp the broach or the lower chuck failing to release the tool when the broaching machine is lifted, the machine cannot be stopped promptly due to the absence of corresponding detection and alarm devices, easily leading to broach damage or even safety accidents. Second, in humid environments with high cutting fluid content, sensors and other detection components lack effective protection and are easily affected by cutting fluid splashes, causing false alarms. Furthermore, when the lower chuck unexpectedly exceeds its travel range, the lack of effective mechanical limit protection may cause the spring to flatten and fail, thereby damaging the lower chuck assembly. Therefore, a tool-gripping detection mechanism for the lower chuck of a pulldown vertical broaching machine is proposed to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a downward-pull vertical broaching machine chuck tool gripping detection mechanism, which has advantages such as improved operational reliability and solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tool-gripping detection mechanism for a vertical broaching machine includes a worktable, a pad, a lower slide plate, a broach, and a lower chuck. A sleeve clamping block is fixedly connected to the lower surface of the worktable, and a tool-gripping assembly is provided on the upper part of the lower chuck.

[0007] The gripper assembly includes a sleeve fitted onto the upper part of the lower chuck. Multiple push rods are fixedly connected to the upper end face of the sleeve. A spring protective cover is fixedly connected to the lower end face of the sleeve via a pad. Multiple gripping pins are provided on the inner wall of the sleeve. The sleeve protective cover is fitted onto the outer wall of the lower chuck. A spring fixing seat is fixedly connected to the middle of the lower chuck. Multiple spring limiting pins are fixedly connected to the upper surface of the spring fixing seat. A spring is fitted onto the outer wall of the multiple spring limiting pins. A limit stop is provided below the spring fixing seat.

[0008] The upper surface of the sliding plate is provided with a detection component.

[0009] Furthermore, the detection mechanism includes a sensor bracket fixedly connected to the upper surface of the sliding plate, a sensor fixedly connected to the upper end of the sensor bracket, a sensor protective cover fixedly connected to the side wall of the pad, an adjusting pin threadedly connected to the side wall of the sensor protective cover, a transparent observation window embedded in the front of the sensor protective cover, and the adjusting pin adjustablely set to the side wall of the sensor protective cover by means of threaded connection.

[0010] Furthermore, a sensor limiting block is fixedly connected to the side wall of the spring fixing seat, and a limiting block bracket is fixedly connected to the upper surface of the lower slide plate. The sensor limiting block is slidably connected in the positioning groove of the limiting block bracket.

[0011] Furthermore, a fixing block is provided on the lower outer circumferential surface of the lower clamp, and the fixing block is fixedly connected to the lower slide plate by bolts.

[0012] Furthermore, a positioning key is provided at the connection between the fixing block and the lower clamp, with one end of the positioning key embedded in the fixing block and the other end embedded in the lower clamp.

[0013] Furthermore, a limiting pin is provided on the upper outer circumferential surface of the lower chuck, and the limiting pin is located below the gripper pin.

[0014] Furthermore, a locking nut is threaded onto the inner circumferential surface of the lower end of the spring fixing seat, and the locking nut engages with the external thread of the lower clamp.

[0015] Furthermore, the lower inner circumferential surface of the spring protective cover and the upper outer circumferential surface of the spring fixing seat form a sliding fit.

[0016] Compared with the prior art, this utility model provides a downward-type vertical broaching machine chuck tool gripping detection mechanism, which has the following beneficial effects:

[0017] This pulldown vertical broaching machine chuck tool gripping detection mechanism integrates a mechanical clamping mechanism and an electronic detection system to achieve real-time monitoring of the tool clamping status, effectively preventing tool damage accidents caused by clamping failure. The sealed design of the sensor protective cover ensures the reliability of the detection system under harsh working conditions, while the multi-level limit mechanism provides overload protection, significantly improving the safety and service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 2 This is a front view of the structure of this utility model;

[0020] Figure 3 This is a side view of the structure of this utility model.

[0021] In the diagram: 1. Workbench; 2. Sleeve clamping block; 3. Push rod; 4. Sleeve; 5. Pad; 6. Spring protective cover; 7. Spring fixing seat; 8. Locking nut; 9. Lower slide plate; 10. Sensor limit block; 11. Claw pin; 12. Pulling knife; 13. Sleeve protective cover; 14. Lower chuck; 15. Adjusting pin; 16. Spring; 17. Spring limit pin; 18. Sensor protective cover; 19. Sensor; 20. Sensor bracket; 21. Fixing block; 22. Positioning key; 23. Limit pin; 24. Limit stop; 25. Limit block bracket. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 3 The present embodiment of a pull-down vertical broaching machine lower chuck tool gripping detection mechanism includes a worktable 1, a pad 5, a lower slide plate 9, a broach 12 and a lower chuck 14. A sleeve clamping block 2 is fixedly connected to the lower surface of the worktable 1, and a tool gripping assembly is provided on the upper part of the lower chuck 14.

[0024] Please see Figure 1 In this embodiment, the gripping assembly includes a sleeve 4 fitted onto the upper part of the lower chuck 14. A plurality of push rods 3 are fixedly connected to the upper end face of the sleeve 4. A spring protective cover 6 is fixedly connected to the lower end face of the sleeve 4 through a pad 5. A plurality of gripping pins 11 are provided on the inner wall of the sleeve 4. A sleeve protective cover 13 is fitted onto the outer wall of the lower chuck 14. A spring fixing seat 7 is fixedly connected to the middle part of the lower chuck 14. A plurality of spring limiting pins 17 are fixedly connected to the upper surface of the spring fixing seat 7. A spring 16 is fitted onto the outer wall of the plurality of spring limiting pins 17. A limiting block 24 is provided below the spring fixing seat 7.

[0025] The upper surface of the slide plate 9 is provided with a detection component. The detection mechanism includes a sensor bracket 20 fixedly connected to the upper surface of the slide plate 9, a sensor 19 fixedly connected to the upper end of the sensor bracket 20, a sensor protective cover 18 fixedly connected to the side wall of the pad plate 5, an adjusting pin 15 threadedly connected to the side wall of the sensor protective cover 18, a transparent observation window embedded in the front of the sensor protective cover 18, and the adjusting pin 15 is adjustablely set to the side wall of the sensor protective cover 18 by means of threaded connection.

[0026] Specifically, a sensor limiting block 10 is fixedly connected to the side wall of the spring fixing seat 7, and a limiting block bracket 25 is fixedly connected to the upper surface of the lower slide plate 9. The sensor limiting block 10 is slidably connected in the positioning groove of the limiting block bracket 25.

[0027] Specifically, a fixing block 21 is provided on the lower outer circumferential surface of the lower chuck 14, and the fixing block 21 is fixedly connected to the lower slide plate 9 by bolts.

[0028] It should be noted that the fixing block 21 and the lower chuck 14 are precisely positioned by the positioning key 22 and then bolted together, which ensures the coaxiality and installation stability between the chuck assembly and the lower slide plate 9 and avoids the accumulation of machining errors.

[0029] Specifically, a positioning key 22 is provided at the connection between the fixing block 21 and the lower clamp 14. One end of the positioning key 22 is embedded in the fixing block 21, and the other end is embedded in the lower clamp 14.

[0030] Specifically, a limit pin 23 is provided on the upper outer circumferential surface of the lower chuck 14, and the limit pin 23 is located below the gripper pin 11.

[0031] It should be noted that the limiting pin 23 not only limits the insertion depth of the pull cutter 12, but also forms a double insurance mechanism with the gripping pin 11 to prevent the pull cutter 12 from being over-inserted and damaging the internal mechanism under abnormal conditions.

[0032] Specifically, a locking nut 8 is threaded onto the inner circumferential surface of the lower end of the spring fixing seat 7, and the locking nut 8 is engaged with the external thread of the lower collet 14.

[0033] It should be noted that the locking nut 8 locks the spring fixing seat 7 in the set position through a threaded connection, which facilitates the adjustment of the preload of the spring 16 and provides reliable axial fixation for the entire spring assembly.

[0034] Specifically, the lower inner circumferential surface of the spring protective cover 6 and the upper outer circumferential surface of the spring fixing seat 7 form a sliding fit.

[0035] The working principle of the above embodiments is as follows:

[0036] The upper servo mechanism drives the broach 12 to descend, accurately inserting its shank into the inner cavity of the lower chuck 14 until the stepped surface of the broach 12 contacts and positions itself against the limit pin 23, completing the tool loading. The main servo motor drives the lower slide plate 9 to move the lower chuck 14 downward, and the sleeve 4 moves upward relative to it under the action of the spring 16. The inner conical surface pushes the gripping pin 11 to radially retract and clamp the broach 12 neck. At the same time, the sensor protective cover 18, which is linked to the sleeve 4, moves the adjusting pin 15 upward and away from the detection area of ​​the sensor 19. The sensor 19 then sends a signal to the control system. Upon receiving a clamping confirmation signal, the system activates the main servo motor to drive the lower slide plate 9, which in turn drives the clamping mechanism and the broach 12 to perform a downward broaching motion to complete the workpiece machining. After broaching, the lower slide plate 9 moves upward, and the push rod 3 contacts the sleeve clamping block 2, forcing the sleeve 4 to move downward to release the clamping force. The upper locking mechanism lifts the broach 12, and pushes the gripping pin 11 open through the tapered surface of the blade neck, completing the tool release. At the same time, the adjusting pin 15 moves downward with the sensor protective cover 18 into the detection area of ​​the sensor 19. The system detects the tool release signal and completes the work cycle.

[0037] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0038] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A broaching and tool-gripping detection mechanism for a vertical broaching machine, comprising a worktable (1), a pad (5), a lower slide plate (9), a broach (12), and a lower chuck (14), characterized in that: A sleeve clamping block (2) is fixedly connected to the lower surface of the workbench (1), and a knife gripping assembly is provided on the upper part of the lower chuck (14). The gripper assembly includes a sleeve (4) fitted onto the upper part of the lower chuck (14). Multiple push rods (3) are fixedly connected to the upper end face of the sleeve (4). A spring protective cover (6) is fixedly connected to the lower end face of the sleeve (4) through a pad (5). Multiple gripper pins (11) are provided on the inner wall of the sleeve (4). A sleeve protective cover (13) is fitted onto the outer wall of the lower chuck (14). A spring fixing seat (7) is fixedly connected to the middle part of the lower chuck (14). Multiple spring limiting pins (17) are fixedly connected to the upper surface of the spring fixing seat (7). A spring (16) is fitted onto the outer wall of the multiple spring limiting pins (17). A limiting block (24) is provided below the spring fixing seat (7). The upper surface of the sliding plate (9) is provided with a detection component.

2. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 1, characterized in that: The detection mechanism includes a sensor bracket (20) fixedly connected to the upper surface of the slide plate (9). A sensor (19) is fixedly connected to the upper end of the sensor bracket (20). A sensor protective cover (18) is fixedly connected to the side wall of the pad (5). An adjusting pin (15) is threadedly connected to the side wall of the sensor protective cover (18). A transparent observation window is embedded in the front of the sensor protective cover (18). The adjusting pin (15) is adjustablely set to the side wall of the sensor protective cover (18) by means of threaded connection.

3. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 1, characterized in that: The side wall of the spring fixing seat (7) is fixedly connected to a sensor limiting block (10), and the upper surface of the sliding plate (9) is fixedly connected to a limiting block bracket (25). The sensor limiting block (10) is slidably connected in the positioning groove of the limiting block bracket (25).

4. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 1, characterized in that: The lower end of the lower clamp (14) is provided with a fixing block (21) on its outer circumferential surface. The fixing block (21) is fixedly connected to the lower slide plate (9) by bolts.

5. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 4, characterized in that: A positioning key (22) is provided at the connection between the fixing block (21) and the lower clamp (14). One end of the positioning key (22) is embedded in the fixing block (21), and the other end is embedded in the lower clamp (14).

6. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 1, characterized in that: The upper outer circumferential surface of the lower chuck (14) is provided with a limiting pin (23), which is located below the gripper pin (11).

7. The tool-gripping detection mechanism for the lower chuck of a vertical broaching machine according to claim 1, characterized in that: The lower end of the spring fixing seat (7) is threaded with a locking nut (8), which is engaged with the external thread of the lower clamp (14).

8. The tool-gripping detection mechanism for the chuck of a vertical broaching machine according to claim 1, characterized in that: The lower inner circumferential surface of the spring protective cover (6) and the upper outer circumferential surface of the spring fixing seat (7) form a sliding fit.

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