Profiling tool rest for cutting outer circle and inner circle
By using nitrogen spring drag plates and chip stop mechanisms in mechanical cutting tool holders, the problems of inconsistent slopes and chip loss in steel pipe cutting are solved, and the tool adaptive expansion and precise cutting are achieved, which improves processing accuracy and device stability.
Patent Information
- Application Number
- CN202411658943.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2024-12-27
AI Technical Summary
The existing mechanical cutting tool holder is inconsistent in the bevel due to rigid connection during the steel pipe cutting process, and the reaction force of the spiral compression spring is difficult to accurately control, which is prone to failure due to fatigue and lacks anti-chip function, resulting in machining accuracy and device stability. insufficient.
A contoured tool holder for cutting outer and inner circle is designed. A nitrogen spring drag plate is used to realize the adaptive expansion and contraction of the tool. The spring reaction force is controlled by nitrogen gas pressure, and a chip blocking mechanism is set in the feeding mechanism to close it. Designed to prevent shaving.
Accurate control of the magnitude of the spring reaction force is achieved, accuracy deviations due to expansion and contraction length are avoided, consistency of bevel processing accuracy is ensured, and the stable operation of the device is improved through the design to prevent chip loss.
Smart Images
Figure CN119188426A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mechanical cutting tool holders, in particular to a profiling tool holder for cutting outer and inner circles. Background Art
[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.
[0003] In the process of mechanical cutting of the end face groove of steel pipe, since the tool and the tool holder on the tool holder device are generally rigidly connected, when the ovality of the steel pipe is large or the deviation between the rotation center of the machine clamping tool holder device and the central axis of the steel pipe is large, the groove size after cutting is different, which cannot meet the requirements of high-precision groove cutting.
[0004] The solution in the prior art is to add a helical compression spring to the conventional tool holder device, so that the cutting tool always presses against the steel pipe under the reaction force of the compression spring, thereby compensating for the groove processing accuracy problem caused by errors such as steel pipe accuracy, clamping accuracy, and mechanical movement accuracy. However, after the helical compression spring is installed, the structure of the tool holder device will appear to be more complicated and bulky, and because the reaction force of the helical compression spring is affected by the change in compression length, the reaction force of the spring cannot be accurately controlled. In addition, the fatigue strength caused by the number of spring expansion and contraction will cause spring failure. Therefore, the installation of a compression helical spring also has many shortcomings in the cutting accuracy of the steel pipe groove. In addition, the existing tool holder device also has no anti-chip function. During the cutting process, iron chips often fall into the spiral groove of the feed screw nut of the tool holder device, causing the tool holder feed to get stuck, thereby causing a malfunction.
[0005] Based on the above reasons, the present invention designs a contoured tool holder for external and internal cutting, which can adapt to the size of the spring reaction force without being affected by the telescopic length and spring fatigue, and further has an anti-chipping function to improve the stability of the device operation. Summary of the invention
[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a contoured tool holder for external and internal cutting, which can adapt to the size of the spring reaction force without being affected by the telescopic length and spring fatigue, and further has an anti-chipping function to improve the stability of the device operation.
[0007] In order to achieve the above-mentioned object, the present invention provides a profiling tool holder for external and internal cutting, comprising a feed mechanism, a spring mechanism and a chip blocking mechanism; The main body of the feed mechanism is a tool holder seat, which is connected to the fixed plate by screw three, a seat bearing is installed on one side of the fixed plate by screw four, a feed screw is installed at the center of the seat bearing, a shaft retaining ring one is sleeved on the outside of the feed screw, a feed ratchet is sleeved on the outside of the shaft retaining ring one, an adjustment block for adjusting the gap of the dovetail block is arranged inside the tool holder seat by screw two, a feed nut is installed on the feed screw inside the tool holder seat, and the feed nut is transmission-connected to the dovetail block; The spring mechanism is located on the tool elastic seat above the feed mechanism, a screw seven is arranged on the tool elastic seat, the inner end of the screw seven abuts against the tool elastic slider, a pair of linear guide shafts are arranged on the two side wings of the tool elastic slider, the linear guide shafts are limited by a pair of screws one on the outer side of the tool elastic slider, a forming tool rod is arranged in the middle of the tool elastic slider, a nitrogen spring is arranged on one side of the tool elastic seat, and the inner end of the nitrogen spring is connected to the tool elastic slider; The chip guard mechanism is set above the tool holder seat by screw five. The chip guard mechanism is located at both ends of the dovetail block. The baffle in the chip guard mechanism is connected to the outer side of the dovetail block by screw six. The inner side of the dovetail block is connected to the chip guard plate, and the inner side of the chip guard plate is connected to the pad block.
[0008] A key is arranged in the axial direction on the outer side of the fixing plate.
[0009] The nitrogen spring and screw 7 are kept on the same axis.
[0010] Linear sleeves are arranged on both side wings of the linear guide shaft close to the elastic slide block of the tool, and a second shaft retaining ring is arranged on the inner side of the linear sleeve.
[0011] A pair of baffles are respectively arranged on the outer sides of the two vertical surfaces of the tool elastic seat and located at the axial position of the linear guide shaft.
[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention is based on the tool holder feed mechanism and is additionally equipped with a nitrogen spring slide plate to realize adaptive extension and retraction of the tool, wherein the magnitude of the spring reaction force is determined by the air pressure of the nitrogen spring inflation, the magnitude of the spring reaction force is fixed and controllable, and is not affected by the extension and retraction length, and can adaptively compensate for the groove processing accuracy problems caused by errors such as steel pipe accuracy, clamping accuracy, and mechanical movement accuracy. The closed design of the feed mechanism prevents chip dropping and ensures the normal operation of the tool holder device. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a front view of the present invention.
[0014] Figure 2 It is a schematic diagram of the AA cross section of the present invention.
[0015] Figure 3 It is a three-dimensional schematic diagram of the present invention.
[0016] Description of reference numerals: 1 is screw one, 2 is tool holder seat, 3 is adjustment block, 4 is screw two, 5 is fixing plate, 6 is screw three, 7 is seat bearing, 8 is screw four, 9 is feed screw, 10 is shaft retaining ring one, 11 is feed ratchet, 12 is screw five, 13 is feed nut, 14 is dovetail block, 15 is key, 16 is spacer block, 17 is chip guard plate, 18 is baffle plate, 19 is screw six, 20 is screw seven, 21 is tool elastic seat, 22 is tool elastic slider, 23 is forming tool rod, 24 is nitrogen spring, 25 is shaft retaining ring two, 26 is linear bushing, 27 is linear guide shaft, 28 is baffle plate. DETAILED DESCRIPTION
[0017] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0018] The present invention will now be further described with reference to the accompanying drawings.
[0019] See also Figures 1 to 3 , the present invention provides a profiling tool holder for external and internal cutting, including a feed mechanism, a spring mechanism and a chip blocking mechanism; The main body of the feed mechanism is a tool holder seat 2, which is connected to a fixed plate 5 by screws three 6, a seat bearing 7 is installed on one side of the fixed plate 5 by screws four 8, a feed screw 9 is installed at the center of the seat bearing 7, a shaft retaining ring 10 is sleeved on the outside of the feed screw 9, a feed ratchet 11 is sleeved on the outside of the shaft retaining ring 10, an adjustment block 3 for adjusting the gap of a dovetail block 14 is arranged inside the tool holder seat 2 by screws two 4, a feed nut 13 is installed on the feed screw 9 inside the tool holder seat 2, and the feed nut 13 is connected to the dovetail block 14 in a transmission manner; The spring mechanism is located on the tool elastic seat 21 above the feed mechanism, and a screw 20 is provided on the tool elastic seat 21, and the inner side end of the screw 20 abuts against the tool elastic slider 22. A pair of linear guide shafts 27 are provided on both side wings of the tool elastic slider 22, and the linear guide shafts 27 are limited by a pair of screws 1 on the outer side of the tool elastic slider 22. A molded tool rod 23 is provided in the middle of the tool elastic slider 22, and a nitrogen spring 24 is provided on one side of the tool elastic seat 21, and the inner side end of the nitrogen spring 24 is connected to the tool elastic slider 22; The chip guard mechanism is arranged above the tool holder seat 2 by screw five 12, and the chip guard mechanism is located at both ends of the dovetail block 14. The baffle plate 18 in the chip guard mechanism is connected to the outer side of the dovetail block 14 by screw six 19. The inner side of the dovetail block 14 is connected to the chip guard plate 17, and the inner side of the chip guard plate 17 is connected to the raising block 16.
[0020] A key 15 is provided on the axial direction of the feed screw 9 outside the fixing plate 5 .
[0021] The nitrogen spring 24 and the screw 20 are kept on the same axis.
[0022] Linear sleeves 26 are provided on both sides of the linear guide shaft 27 near the tool elastic slider 22 , and a shaft retaining ring 25 is provided inside the linear sleeve 26 .
[0023] A pair of baffles 28 are respectively provided on the outer sides of the two vertical surfaces of the tool elastic seat 21 and located in the axial position of the linear guide shaft 27 .
[0024] Working principle: Nitrogen of set pressure is injected into the nitrogen spring 24 so that the reaction force generated by the nitrogen spring 24 meets the cutting requirements. The profiling tool holder is installed on the cutting machine, and the steel pipe is placed on the right side of the forming tool rod 23. The tool on the forming tool rod 23 is radially fed from the outer circle of the steel pipe to the center of the steel pipe. During installation, the blade edge of the forming tool rod 23 is in contact with the steel pipe and the telescopic rod of the nitrogen spring 24 is retracted by 5 mm to 10 mm. There are two groups of linear sleeves 26 and linear guide shafts 27, which are used to provide the guiding function of the nitrogen spring 24. The feed ratchet 11 rotates one tooth under the periodic impact of the collision block, driving the feed screw 9 to rotate an angle, and the feed nut 13 then drives the dovetail block 14 to move a distance, thereby driving the tool elastic seat 21, the tool elastic slider 22, the forming tool rod 23, the nitrogen spring 24, etc. fixed on the dovetail block 14 to realize periodic feed together, wherein the adjustment block 3 is used to adjust the gap of the dovetail block 14.
[0025] During the cutting process, regardless of the precision deviation caused by the ovality deviation of the steel pipe or the processing and assembly deviation of the clamped parts, the nitrogen spring 24 can adaptively compensate for the corresponding deviation distance under the action of the air pressure of the retracted telescopic rod and the inflated nitrogen spring 24, so that the cutting depth remains unchanged and the groove size is consistent.
[0026] The baffle plate 18, the chip guard plate 17 and the pad 16 on the inner side of the chip guard plate 17 completely isolate the tool elastic seat 21 outside the plane to achieve a closed design, preventing chips from falling into the feed screw 9 and the feed nut 13, thereby protecting the feed mechanism and allowing the device to operate normally and stably.
[0027] The above are only preferred embodiments of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
[0028] The present invention solves the problems of groove processing accuracy caused by errors in steel pipe accuracy, clamping accuracy, mechanical movement accuracy, etc. in the steel pipe end face cutting tool holder device in the prior art as a whole, as well as spring failure caused by fatigue strength, and additional chip falling problems. By adding a nitrogen spring slide plate on the basis of the tool holder feed mechanism, the adaptive extension and retraction of the tool is realized. The magnitude of the spring reaction force is determined by the air pressure of the nitrogen spring inflation. The magnitude of the force is fixed and controllable and is not affected by the extension and retraction length. At the same time, the feed mechanism is closed in design and has a chip blocking function, which provides assistance for the precise cutting of the steel pipe groove and the stable operation of the cutting device.
Claims
1. A steel pipe end cutting machine, characterized in that: It includes a feed mechanism, a spring mechanism and a chip blocking mechanism; The main body of the feed mechanism is a tool holder seat (2), the tool holder seat (2) is connected to the fixed plate (5) by screw three (6), a seat bearing (7) is installed on one side of the fixed plate (5) by screw four (8), a feed screw (9) is installed in the center of the seat bearing (7), a shaft retaining ring (10) is sleeved on the outer side of the feed screw (9), a feed ratchet (11) is sleeved on the outer side of the shaft retaining ring (10), an adjustment block (3) for adjusting the gap of the dovetail block (14) is arranged inside the tool holder seat (2) by screw two (4), a feed nut (13) is installed on the feed screw (9) inside the tool holder seat (2), and the feed nut (13) is drivingly connected to the dovetail block (14); The spring mechanism is located on the tool elastic seat (21) above the feed mechanism, a screw seven (20) is provided on the tool elastic seat (21), the inner end of the screw seven (20) abuts against the tool elastic slider (22), a pair of linear guide shafts (27) are provided on both side wings of the tool elastic slider (22), the linear guide shafts (27) are limited by a pair of screws one (1) on the outer side of the tool elastic slider (22), a molded tool rod (23) is provided in the middle of the tool elastic slider (22), a nitrogen spring (24) is provided on one side of the tool elastic seat (21), and the inner end of the nitrogen spring (24) is connected to the tool elastic slider (22); The chip guard mechanism is arranged above the tool holder seat (2) by screw five (12), and the chip guard mechanism is located at both ends of the dovetail block (14). The baffle plate (18) in the chip guard mechanism is connected to the outer side of the dovetail block (14) by screw six (19), and the inner side of the dovetail block (14) is connected to a chip guard plate (17), and the inner side of the chip guard plate (17) is connected to a pad block (16).
2. The steel pipe end face cutting machine according to claim 1, characterized in that: The feed screw (9) is provided with a key (15) in the axial direction outside the fixing plate (5).
3. The steel pipe end face cutting machine according to claim 1, characterized in that: The nitrogen spring (24) and the screw seven (20) are maintained on the same axis.
4. The steel pipe end face cutting machine according to claim 1, characterized in that: Linear sleeves (26) are provided on both side wings of the linear guide shaft (27) close to the tool elastic slider (22), and a second shaft retaining ring (25) is provided on the inner side of the linear sleeve (26).
5. The steel pipe end face cutting machine according to claim 1, characterized in that: A pair of baffles (28) are provided on the outer sides of the two vertical surfaces of the tool elastic seat (21) at the axial position of the linear guide shaft (27).