A double screw pump helical sleeve profile forming milling device

Abstract

The application provides a double screw pump spiral sleeve profile forming milling device, and relates to the field of spiral sleeve processing.The device comprises a base, a driving screw, a fixed support and a moving table.A threaded cylinder is installed on the inner bottom side of the moving table, and the driving screw is connected to the threaded cylinder through thread engagement.Two groups of processing material driving shafts are rotatably clamped on the moving table.The front end of the thick part of the two groups of processing material driving shafts is provided with a supporting structure, and the front end of the thin part of the two groups of processing material driving shafts is provided with a lifting structure.The fixed support is fixed on the base, a double-head driving motor is installed on the top rear end of the fixed support, two groups of milling cutter driving shafts are rotatably clamped on the inner top side of the fixed support, and the rear end of the milling cutter driving shafts is in transmission connection with the motor shaft at the rear end of the double-head driving motor.The device can process two groups of spiral raw materials at the same time, has low cost, and solves the problems of high investment and low processing efficiency of the existing process machining machine tool.

Description

Technical Field

[0001] This invention relates to the field of spiral sleeve machining technology, and in particular to a twin-screw pump spiral sleeve profile forming milling machining device. Background Technology

[0002] Twin-screw pumps, as high-efficiency fluid transport equipment, rely on a pair of precisely meshing screw sleeves as their core components. Their helical structure forms a continuous sealed chamber through rotation, achieving low-pulsation, high-volume-efficiency liquid transport. They are widely applicable to complex media such as oils, aqueous solutions, and high-viscosity emulsions. However, the following technical bottlenecks are currently prevalent in the screw sleeve manufacturing field:

[0003] 1. The existing process relies on high-precision CNC machine tools to mill the spiral sleeve blanks one by one, which results in high equipment purchase and maintenance costs. Taking a five-axis linkage machining center as an example, the investment in a single machine exceeds one million yuan, and special tooling fixtures are required, which further increases the overall production cost.

[0004] 2. Traditional machine tools adopt a single-station operation mode of "one clamp and one installation". Each spiral sleeve needs to go through multiple processes such as clamping and positioning, rough machining, fine machining, and inspection. According to statistics, it takes an average of 4-6 hours to complete the processing of a single spiral sleeve. The equipment utilization rate is less than 60%, which is difficult to meet the needs of large-scale production. Summary of the Invention

[0005] To address the problems in the background art, this invention provides a twin-screw pump spiral sleeve forming milling device. It uses a dual-head drive motor to drive the milling cutter drive shaft and two sets of material drive shafts to rotate, simultaneously processing two sets of spiral raw materials. Furthermore, under the action of the transmission belt tensioning structure, even if the material drive shafts are lifted upwards, the transmission between the dual-head drive motors and the material drive shafts is not affected. The overall structure of this invention is relatively simple, and its cost is lower than that of machining using machine tools.

[0006] The present invention provides a twin-screw pump spiral sleeve profile forming milling processing device, specifically including: a base, a drive screw, a fixed bracket and a moving table;

[0007] The base has a first drive motor installed at its rear end, and the front end of the first drive motor is connected to a drive screw. The moving platform is slidably mounted on the base. A threaded cylinder is installed on the bottom side of the moving platform, and the drive screw is also connected to the threaded cylinder by thread engagement. Two sets of material drive shafts are rotatably mounted on the moving platform. The two sets of material drive shafts have a structure with a larger front diameter and a smaller rear diameter. The lower front end of the larger diameter part of the two sets of material drive shafts is provided with a support structure, and the front end of the smaller diameter part of the two sets of material drive shafts is provided with a lifting structure. The fixed bracket has a U-shaped structure and is fixed on the base. A double-head drive motor is installed at the rear end of the top of the fixed bracket. Two sets of milling cutter drive shafts are rotatably mounted on the inner side of the upper end of the fixed bracket. The two sets of milling cutter drive shafts are inclined to the lower material drive shaft, and the rear end of the milling cutter drive shaft is connected to the motor shaft at the rear end of the double-head drive motor. The front end of the two sets of milling cutter drive shafts is provided with a locking key A, and the front end of the milling cutter drive shaft is installed with a milling cutter through the locking key A.

[0008] Furthermore, the front and rear sides of the locking key A on the two sets of milling cutter drive shafts are respectively screwed with locking sleeves, and the side of the locking sleeve closest to the milling cutter is provided with six sets of plates.

[0009] Furthermore, the support structure includes a front support frame, a guide column B, and an electric push rod B;

[0010] The top of the front support frame is provided with a material drive shaft placement groove, and guide columns B are inserted through both ends of the bottom. The bottom middle is connected to the telescopic end of the electric push rod B, and the bottom ends of the guide columns B and the electric push rod B are respectively fixed to the inner bottom of the moving table.

[0011] Furthermore, each of the two ends of the top side of the front support frame is equipped with a manual adjustment screw through an internal threaded hole. The front end of the manual adjustment screw is connected to an adjustment handwheel, and the rear end is fixed with a baffle plate. Six sets of balls are embedded on the side of the baffle plate away from the front support frame.

[0012] Furthermore, the lifting structure includes an inner support frame, a guide column A, and an electric push rod A;

[0013] The front ends of the thinner diameter sections of the two sets of material drive shafts rotate and pass through the inner support frame. The bottom end of the inner support frame is attached to the moving platform. Guide columns A are inserted at both ends of the bottom, and the middle of the bottom is connected to the telescopic end of the electric push rod A.

[0014] Furthermore, the two sets of material drive shafts are respectively provided with locking keys B on the thicker end and fixed with baffles, and the thinner rear end passes through the slide groove of the moving table and then passes out of the moving table to connect with the limiting circular plate.

[0015] Furthermore, the motor shaft at the front end of the dual-head drive motor is connected to the two sets of material processing drive shafts via transmission belts, and transmission belt tensioning structures are respectively attached to the transmission belts.

[0016] Furthermore, the transmission belt tensioning structure includes a tensioning wheel, a U-shaped adjusting bracket, and a spring;

[0017] The tensioning wheels are respectively pressed against the upper sides of the two inclined rubber belts of the transmission belt, and the tensioning wheels are respectively rotated and inserted into the U-shaped adjustment frame. The two sets of vertical rods of the U-shaped adjustment frame are respectively fitted with springs, and the fixed brackets extend upwards to connect with circular plates.

[0018] The twin-screw pump helical sleeve profile forming milling device provided by the present invention has the following beneficial effects:

[0019] This invention uses a dual-head drive motor to drive the milling cutter drive shaft and two sets of material drive shafts to rotate, simultaneously processing two sets of spiral materials. Furthermore, under the action of the transmission belt tensioning structure, even if the material drive shaft is lifted upwards, it does not affect the transmission between the dual-head drive motor and the material drive shaft. The overall structure of this invention is relatively simple, and the cost is lower compared to processing with machine tools.

[0020] In addition, by setting a front support frame, after the spiral sleeve material is inserted into the material drive shaft, the front support frame can be raised upward under the drive of the electric push rod B to support the front end of the material drive shaft. The position of the baffle can be adjusted by manually adjusting the screw, and the baffle and the ball can be used to lock the spiral sleeve material.

[0021] In addition, by setting up a dual-head drive motor, two sets of milling cutter drive shafts and two sets of workpiece drive shafts can be driven to rotate, thereby driving the milling cutters on the two sets of milling cutter drive shafts and the spiral sleeve workpieces on the two sets of workpiece drive shafts to rotate. The first drive motor drives the drive screw to rotate, and under the meshing action of the drive screw and the threaded cylinder, it drives the moving table to move to the rear, thereby milling the spiral sleeve workpieces by the milling cutters.

[0022] Furthermore, by setting up electric push rods A and B, and using the same material drive shaft, the electric push rods A and B can drive the material drive shaft to rise a certain distance after the milling cutter has processed the spiral sleeve material once. Under the action of the transmission belt tensioning structure, the transmission belt is always kept in a tensioned state, so that the profile of the spiral sleeve material can be processed into shape through multiple processing steps. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0024] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0025] In the attached diagram:

[0026] Figure 1 A schematic diagram of the overall structure of the present invention is shown;

[0027] Figure 2 The present invention is shown Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 3 The present invention is shown Figure 1 Schematic diagram of the left-side side view structure;

[0029] Figure 4 The present invention is shown Figure 1 A cross-section of the upper end and vertical end of the fixed bracket and a schematic diagram of the structure after the removal of the inner and outer vertical plates of the moving platform;

[0030] Figure 5 The present invention is shown Figure 4 Enlarged structural diagram at point B;

[0031] Figure 6 The present invention is shown Figure 4 Schematic diagram of the right-center view structure;

[0032] Figure 7 The present invention is shown Figure 4 Mid-top view of the structure;

[0033] Figure 8 The present invention is shown Figure 1 A schematic diagram of the structure when a set of milling cutters and a spiral sleeve are removed from the workpiece;

[0034] Figure 9 The present invention is shown Figure 8 Enlarged structural diagram at point C.

[0035] List of reference numerals

[0036] 1. Base; 101. First drive motor; 102. Drive screw; 2. Fixed bracket; 201. Dual-head drive motor; 202. Milling cutter drive shaft; 2021. Locking key A; 2022. Milling cutter; 2023. Locking sleeve; 20231. Plate; 3. Moving table; 301. Threaded cylinder; 302. Material drive shaft; 3021. Locking key B; 3022. Baffle; 303. Inner support frame; 3031. Guide column A; 3032. Electric push rod A; 304. Front support frame; 3041. Guide column B; 3042. Electric push rod B; 3043. Manual adjusting screw; 30431. Baffle plate; 305. Slide groove; 4. Tensioning wheel; 401. U-shaped adjusting frame; 402. Spring. Detailed Implementation

[0037] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0038] Example 1: Please refer to Figures 1 to 9 :

[0039] This invention proposes a twin-screw pump spiral sleeve forming milling device, comprising: a base 1, a drive screw 102, a fixed bracket 2, and a moving table 3;

[0040] A first drive motor 101 is installed at the rear end of the base 1, and the front end of the first drive motor 101 is connected to the drive screw 102. The movable stage 3 is slidably installed on the base 1. A threaded cylinder 301 is installed on the bottom side of the interior of the movable stage 3, and the drive screw 102 is also connected to the threaded cylinder 301 by threaded engagement. Two sets of material processing drive shafts 302 are rotatably mounted on the movable stage 3, and the two sets of material processing drive shafts 302 have a structure with a larger diameter at the front end and a smaller diameter at the rear end. The lower front end of the larger diameter part of the two sets of material processing drive shafts 302 is also provided with a support structure, and the front end of the smaller diameter part of the two sets of material processing drive shafts 302 is also provided with a support structure. The end is also equipped with a lifting structure. The fixed bracket 2 is a U-shaped structure and is fixed on the base 1. A dual-head drive motor 201 is installed at the top rear end of the fixed bracket 2. Two sets of milling cutter drive shafts 202 are rotatably clamped on the inner side of the upper end of the fixed bracket 2. The two sets of milling cutter drive shafts 202 are inclined to the lower material drive shaft 302. The rear end of the milling cutter drive shaft 202 is connected to the motor shaft at the rear end of the dual-head drive motor 201. The front end of the two sets of milling cutter drive shafts 202 is provided with a locking key A2021. The front end of the milling cutter drive shaft 202 is respectively installed with a milling cutter 2022 through the locking key A2021.

[0041] In embodiments of the present invention, such as Figure 8 and Figure 9 As shown, locking sleeves 2023 are screwed onto the front and rear sides of the locking key A2021 on the two sets of milling cutter drive shafts 202. The locking sleeves 2023 have six sets of plates 20231 on the side near the milling cutter 2022. When the milling cutter 2022 is inserted into the milling cutter drive shaft 202, the locking key A2021 can engage the milling cutter 2022 with the milling cutter drive shaft 202. The locking sleeves 2023 on the rear side of the milling cutter 2022 can be rotated, and the plates 20231 can be attached to the rear side of the milling cutter 2022. When another set of locking sleeves 2023 is screwed into the front end of the milling cutter drive shaft 202, the plates 20231 on this set of locking sleeves 2023 are attached to the front side of the milling cutter 2022, locking the milling cutter 2022.

[0042] In embodiments of the present invention, such as Figure 2 , Figure 8 and Figure 9 As shown, the support structure includes a front support frame 304, guide columns B3041, and an electric push rod B3042. The top of the front support frame 304 has a groove for placing the material drive shaft, and guide columns B3041 are inserted into both ends of the bottom. The middle of the bottom of each guide column B3041 is connected to the telescopic end of the electric push rod B3042. The bottom ends of the guide columns B3041 and the electric push rod B3042 are fixed to the inner bottom of the moving platform 3. Manual adjustment screws 3043 are also installed at both ends of the top side of the front support frame 304 through internal threaded holes. The front ends of the manual adjustment screws 3043 are connected to adjustment handwheels, and the rear ends are fixed... There is a baffle plate 30431, and six sets of balls are embedded on the side of the baffle plate 30431 away from the front support frame 304. After the spiral sleeve processing material is inserted into the processing material drive shaft 302 and engaged with the locking key B3021, the front support frame 304 is lifted upward by the electric push rod B3042, so that the processing material drive shaft placement groove at the top of the front support frame 304 engages with the front end of the processing material drive shaft 302, supporting the front end of the processing material drive shaft 302. Then, the position of the baffle plate 30431 is adjusted by the manual adjustment screw 3043, and the baffle plate 30431 and the balls are used to lock the spiral sleeve processing material.

[0043] In embodiments of the present invention, such as Figure 1 , Figure 4 and Figure 6 As shown, the lifting structure includes an inner support frame 303, guide columns A3031, and electric push rods A3032. The front ends of the thinner diameter sections of the two sets of material drive shafts 302 are respectively rotatably inserted into the inner support frame 303. The bottom end of the inner support frame 303 is attached to the moving table 3. Guide columns A3031 are inserted at both ends of the bottom, and the middle of the bottom is connected to the telescopic end of the electric push rod A3032, which facilitates the upward lifting of the material drive shaft 302 by the electric push rods A3032 and B3042 under the same material drive shaft 302.

[0044] In embodiments of the present invention, such as Figure 2 , Figure 8 and Figure 9 As shown, the two sets of material drive shafts 302 are respectively equipped with locking keys B3021 on the thicker end and fixed with baffles 3022. The thinner rear end passes through the slide groove 305 of the moving table 3 and then passes out of the moving table to connect with the limiting circular plate. This makes it easy to insert the spiral sleeve material into the material drive shaft 302 and engage with the locking key B3021. It also makes it easy to lift the material drive shaft 302 upward through the electric push rod A3032 and electric push rod B3042 under the same material drive shaft 302.

[0045] In embodiments of the present invention, such as Figure 4 and Figure 5 As shown, the motor shaft at the front end of the dual-head drive motor 201 is also connected to two sets of material drive shafts 302 via transmission belts. A transmission belt tensioning structure is attached to each transmission belt, which includes a tensioning wheel 4, a U-shaped adjusting frame 401, and a spring 402. The tensioning wheel 4 is attached to the upper side of the two inclined rubber belts of the transmission belt, and rotates through the U-shaped adjusting frame 401. Springs 402 are fitted onto the two sets of vertical rods of the U-shaped adjusting frame 401, and a circular plate extends upward through the fixed bracket 2. When the material drive shaft 302 is lifted upward by the electric push rods A3032 and B3042 under the same material drive shaft 302, the transmission belt remains taut under the action of the tensioning structure, thus not affecting the transmission between the dual-head drive motor 201 and the material drive shaft 302.

[0046] The specific usage and function of this embodiment: In this invention,

[0047] Insert the spiral sleeve material into the material drive shaft 302 and engage it with the locking key B3021. Lift the front support frame 304 upward by the electric push rod B3042, so that the material drive shaft placement groove at the top of the front support frame 304 engages with the front end of the material drive shaft 302, thus supporting the front end of the material drive shaft 302. Then, adjust the position of the baffle 30431 by manually adjusting the screw 3043, and use the baffle 30431 and the ball to lock the spiral sleeve material.

[0048] Insert the milling cutter 2022 into the front end of the milling cutter drive shaft 202 and engage it with the locking key A2021. Adjust the position of the milling cutter 2022 so that it is located on the top side of the rear end of the material being machined by the spiral sleeve. Then rotate the locking sleeve 2023 on the rear side of the milling cutter 2022 and attach it to the rear side of the milling cutter 2022 through the plate 20231. Screw another set of locking sleeves 2023 into the front end of the milling cutter drive shaft 202, so that the plate 20231 on this set of locking sleeves 2023 is attached to the front side of the milling cutter 2022, locking the milling cutter 2022 in place.

[0049] The dual-head drive motor 201 drives two sets of milling cutter drive shafts 202 and two sets of material drive shafts 302 to rotate, thereby driving the milling cutters 2022 on the two sets of milling cutter drive shafts 202 and the spiral sleeve material on the two sets of material drive shafts 302 to rotate. The first drive motor 101 drives the drive screw 102 to rotate, and under the meshing action of the drive screw 102 and the threaded cylinder 301, the moving table 3 moves to the rear, thereby milling the spiral sleeve material once by the milling cutter 2022.

[0050] Using electric push rods A3032 and B3042 under the same material drive shaft 302, after the milling cutter 2022 processes the spiral sleeve material once, it drives the material drive shaft 302 to rise a certain distance. Under the action of the transmission belt tensioning structure, the transmission belt is always kept in a tensioned state, so that the profile of the spiral sleeve material is processed into shape through multiple deep milling operations.

[0051] The following points should be noted in this article:

[0052] 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0053] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A twin-screw pump spiral sleeve profile forming milling device, comprising: Base, drive screw, fixed bracket and moving platform; The base is characterized in that a first drive motor is installed at its rear end, and the front end of the first drive motor is connected to a drive screw. The movable stage is slidably installed on the base. A threaded cylinder is installed on the inner bottom side of the movable stage, and the drive screw is also connected to the threaded cylinder by thread engagement. Two sets of material drive shafts are rotatably mounted on the movable stage. The two sets of material drive shafts are generally of a structure with a larger front diameter and a smaller rear diameter. The lower front end of the larger diameter part of the two sets of material drive shafts is also provided with a support structure, and the front end of the smaller diameter part of the two sets of material drive shafts is also provided with a lifting structure. The fixed bracket is generally of a U-shaped structure and is fixed on the base. A double-head drive motor is installed at the top rear end of the fixed bracket. Two sets of milling cutter drive shafts are rotatably mounted on the upper inner side of the fixed bracket. The two sets of milling cutter drive shafts are inclined to the lower material drive shaft. The rear end of the milling cutter drive shaft is connected to the motor shaft at the rear end of the double-head drive motor. The front end of the two sets of milling cutter drive shafts is provided with a locking key A, and the front end of the milling cutter drive shaft is respectively mounted with a milling cutter through the locking key A. The support structure includes a front support frame, guide column B, and electric push rod B; The top of the front support frame is provided with a material drive shaft placement groove, and guide columns B are inserted through both ends of the bottom. The bottom middle is connected to the telescopic end of the electric push rod B, and the bottom ends of the guide columns B and the electric push rod B are respectively fixed to the inner bottom of the moving table. The top two ends of the front support frame are each equipped with a manual adjustment screw through an internal threaded hole. The front end of the manual adjustment screw is connected to an adjustment handwheel, and the rear end is fixed with a baffle plate. Six sets of balls are embedded on the side of the baffle plate away from the front support frame. The lifting structure includes an inner support frame, a guide column A, and an electric push rod A; The front ends of the narrower diameter sections of the two sets of material drive shafts rotate and pass through the inner support frame. The bottom end of the inner support frame is attached to the moving table. Guide posts A are inserted at both ends of the bottom, and the middle of the bottom is connected to the telescopic end of the electric push rod A. The two sets of material drive shafts are equipped with locking keys B on the thicker end and fixed with baffles. The thinner end passes through the slide groove of the moving table and then exits the moving table to connect with the limiting circular plate.

2. The twin-screw pump spiral sleeve profile forming milling device according to claim 1, characterized in that: The front and rear sides of the locking key A on the two sets of milling cutter drive shafts are respectively screwed with locking sleeves, and the side of the locking sleeve closest to the milling cutter is provided with six sets of plates.

3. The twin-screw pump spiral sleeve profile forming milling device according to claim 1, characterized in that: The motor shaft at the front end of the dual-head drive motor is also connected to the two sets of material processing drive shafts via transmission belts, and transmission belt tensioning structures are respectively attached to the transmission belts.

4. The twin-screw pump spiral sleeve profile forming milling device according to claim 3, characterized in that: The transmission belt tensioning structure includes a tensioning wheel, a U-shaped adjusting bracket, and a spring; The tensioning wheels are respectively pressed against the upper sides of the two inclined rubber belts of the transmission belt, and the tensioning wheels are respectively rotated and inserted into the U-shaped adjustment frame. The two sets of vertical rods of the U-shaped adjustment frame are respectively fitted with springs, and the fixed brackets extend upwards to connect with circular plates.

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