Milling machine tool for spiral curved surface of screw for double-screw pump

Abstract

The invention provides a screw spiral curved surface milling machine tool for a double-screw pump, and relates to the technical field of screw machining, the screw spiral curved surface milling machine tool comprises a base, the top of the base is fixedly provided with two sets of stand columns, the tops of the stand columns are fixedly provided with a transverse moving device, the front side of the transverse moving device is slidably provided with a transverse moving seat, and the front side of the transverse moving seat is fixedly provided with a vertical moving device; a milling machine is fixedly arranged below the front side of the vertical moving device, and a milling cutter is mounted at the bottom end of the milling machine; a spray head is mounted on one side of the bottom end of the vertical moving device, is inclined and faces the milling cutter; the positioning function without affecting rotation driving is provided through the driving chuck, the screw shaft can be rapidly positioned, the thrust ball bearing composed of the bearing outer ring A and the bearing outer ring B can provide the axial bearing capacity, then the hydraulic piston B is extruded to open the hydraulic piston A so that the clamping blocks can move towards the screw shaft, the clamping blocks in the three directions can approach to the center, and the screw shaft can be rapidly positioned. Operation is convenient, centering positioning can be achieved, and the problem that a conventional chuck is inconvenient to position rapidly is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of screw machining, and particularly relates to a screw spiral surface milling machine tool for a twin-screw pump. Background Art

[0002] When machining a screw, during milling, a rotatable chuck is required to fix the screw shaft, and a milling device with a movement function of two or more axes is used for milling. Thread grooves are milled on the outer part of the screw, and the excess waste chips are recycled. During the milling process, the screw is grooved by a high-speed rotating milling cutter.

[0003] The currently used milling machine tools have the following disadvantages: 1. A fixed chuck is adopted. After the chuck is fixed, a wrench structure is used to control the chuck to lock the screw shaft, and then milling is carried out. The positioning efficiency is slow, which is not conducive to quickly positioning the screw. 2. Excessive milling frequency will cause the temperature of the milling cutter to rise, reducing its service life. There is a lack of an auxiliary function for uniformly cooling during the milling process, and a circulating structure for efficient circulating heat exchange and recycling of waste chips is lacking. 3. It is inconvenient to monitor during the rotation of the screw shaft. Summary of the Invention

[0004] In view of this, in order to address the above deficiencies in the prior art, the present invention provides a screw spiral surface milling machine tool for a twin-screw pump.

[0005] The present invention provides a screw spiral surface milling machine tool for a twin-screw pump, which specifically includes: a base, on the top of the base, two groups of columns are fixedly arranged; on the top of the columns, a transverse movement device is fixedly arranged; a transverse movement seat is slidably arranged on the front side of the transverse movement device; a vertical movement device is fixedly arranged on the front side of the transverse movement seat; a milling cutter is fixedly arranged below the front side of the vertical movement device, and a milling cutter is installed at the bottom end of the milling cutter; a spray head is installed on one side of the bottom end of the vertical movement device, and the spray head is inclined and faces the milling cutter; on the right end of the top of the base, a chuck holder is fixedly arranged, a push control rod group is slidably arranged in the chuck holder, and the left end of the push control rod group is fixedly arranged with an outer ring of bearing A; a driving chuck, in the middle of the right end of the driving chuck, a chuck shaft is integrally arranged, and the chuck shaft is rotatably arranged in the middle of the chuck holder by cooperating with two groups of bearings; three sliding grooves are arranged on the side of the driving chuck, and at the outer end of the middle of each sliding groove, a connecting block is fixedly arranged, on the right side of each connecting block, a hydraulic piston B is fixedly arranged, a spring is sleeved outside the telescopic end of the hydraulic piston B, and the telescopic end of each hydraulic piston B is fixedly arranged with an outer ring of bearing B; the outer ring of bearing B is aligned with the outer ring of bearing A, and a cage and balls are arranged between the outer ring of bearing B and the outer ring of bearing A to form a thrust ball bearing; a stepped storage drawer is embedded in the middle of the top of the base; a receiving tray is fixedly arranged on the top of the base.

[0006] Optionally, a chuck lead screw is rotatably provided on the left side of the top of the base, and a control handwheel is rotatably provided above the left side of the base. The control handwheel is in gear transmission connection with the chuck lead screw; a chuck seat is slidably installed above the left side of the base, and the chuck seat is in threaded connection with the chuck lead screw; a movable chuck is rotatably provided on the right side of the chuck seat, and the center of the movable chuck is aligned with the center of the driving chuck.

[0007] Optionally, a cross-feed lead screw is provided on the front side of the cross-feed device, and a cross-feed motor for driving the cross-feed lead screw is provided at one end of the cross-feed device. The cross-feed lead screw is in threaded connection with the cross-feed base; a vertical-feed lead screw is rotatably provided on the front side of the vertical-feed device, and a vertical-feed motor for driving the vertical-feed lead screw is provided at one end of the vertical-feed device. The vertical-feed lead screw is also in threaded connection with the cross-feed base.

[0008] Optionally, a control lead screw is rotatably provided above the chuck frame, and a handwheel is provided at one end of the control lead screw; a rotary motor is fixedly provided at the bottom of the chuck frame, a driving gear disk is fixedly provided outside the chuck shaft, and a bevel gear is provided at the shaft end of the rotary motor for transmission connection with the driving gear disk; the top of the push control rod group turns forward and upward, and the middle of the push control rod group is a nut structure and is in threaded connection with the control lead screw.

[0009] Optionally, a hydraulic piston A is fixedly provided at one end of the connecting block close to the center of the driving chuck, and a clamping block is fixedly provided at the telescopic end of the hydraulic piston A; the hydraulic piston A and the hydraulic piston B are connected by a pipeline and hydraulic oil is filled in the pipeline.

[0010] Optionally, a linkage gear ring is fixedly provided outside the driving chuck; a driven gear is rotatably provided above the base, and the driven gear meshes with the linkage gear ring; a gear pump is installed above the base, and the rotating shaft of the driven gear is in transmission connection with the gear pump; the water outlet of the gear pump is provided with a three-way pipeline connected to two solenoid valves.

[0011] Optionally, the stepped storage drawer is a stepped structure with a deeper front and a shallower rear, and an intercepting net is fixedly provided at the transition; the water inlet pipe of the gear pump is connected to the front pool inside the stepped storage drawer.

[0012] Optionally, the rear side of the receiving tray is a guiding groove structure extending backward, the inside of the receiving tray is higher in the front and lower in the rear, and the rear end of the receiving tray is located above the rear side of the receiving tray; for the two solenoid valves, one of the solenoid valves is provided with a pipeline connected to the nozzle, and the other solenoid valve is provided with a pipeline connected to the upper side of one side of the receiving tray.

[0013] Optionally, spring rods are slidably limited on both sides of the receiving tray. Springs are sleeved on the tops of the spring rods and wheel seats are fixedly provided. Two detection pulleys are rotatably provided above the wheel seats; at the bottom of the limiting structures below the spring rods, two resistance rods are fixedly provided respectively, and the tops of the two resistance rods are connected; two monitoring slip rings are provided on both sides of the receiving tray, and the resistance rods slide inside the monitoring slip rings.

[0014] The beneficial effects are as follows: 1. The driving chuck provides a positioning function that does not affect the rotary drive, and can quickly position the screw shaft. The thrust ball bearing formed by the bearing outer ring A and the bearing outer ring B can provide axial load-bearing capacity. Then, the hydraulic piston B is squeezed to open the hydraulic piston A and move the clamping block toward the screw shaft. The clamping block can be fixed by moving it closer to the center in three directions. It is easy to operate and can achieve center positioning.

[0015] 2. The driving force can be provided by the linkage gear ring. In the process of rotating the screw shaft, the driven gear is driven to rotate through the gear transmission, driving the gear pump to work and pump water. The flow direction is controlled by the solenoid valve, and the water is delivered to the nozzle for spraying. The milling cutter is continuously sprayed and the temperature is continuously reduced, which greatly improves the working efficiency and service life of the milling cutter. The water sprayed from the nozzle can also wash away most of the waste chips milled outside the screw shaft. The water and waste chips fall to the top of the receiving tray and slide backwards.

[0016] 3. In addition, after the screw shaft is installed, the screw shaft fits the detection pulley, and two sets of monitoring slip rings are used to connect with the resistance rod to transmit signals. During the rotation of the screw shaft, the detection pulley fits the screw shaft and rotates. If the screw shaft is eccentric or bent externally, the detection pulley moves with it through the spring outside the spring rod, driving the resistance rod to slide in the monitoring slip ring, and the resistance changes, which can monitor whether the screw shaft is rotating normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows a schematic diagram of the three-dimensional structure of Example 1 of the present invention; Figure 2 A partial cross-sectional structural diagram of Example 1 of the present invention is shown; Figure 3 The embodiment 1 of the present invention is shown Figure 2 A structural diagram from another angle; Figure 4 It shows a schematic diagram of the three-dimensional disassembled structure of Example 1 of the present invention; Figure 5 Schematic diagram of the three-dimensional cross-sectional structure of the chuck frame in Example 1 of the present invention is shown; Figure 6 The embodiment 1 of the present invention is shown Figure 5 A structural diagram from another angle; Figure 7 The embodiment 1 of the present invention is shown Figure 4 A partial enlarged schematic diagram of the side elevation structure at point A; Figure 8 It shows a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0018] Reference Signs List 1. Base; 101. Column; 102. Chuck lead screw; 103. Control handwheel; 104. Chuck seat; 2. Cross - translation device; 201. Cross - translation lead screw; 202. Cross - translation motor; 203. Cross - translation seat; 3. Vertical - translation device; 301. Vertical - translation lead screw; 302. Vertical - translation motor; 303. Milling cutter; 304. Sprayer; 4. Movable chuck; 5. Chuck frame; 501. Control lead screw; 502. Rotation motor; 503. Push - control rod group; 504. Outer ring of bearing A; 6. Driving chuck; 601. Chuck shaft; 602. Driving gear disc; 603. Connecting block; 604. Hydraulic piston A; 605. Clamping block; 606. Hydraulic piston B; 607. Outer ring of bearing B; 7. Linkage gear ring; 8. Driven gear; 9. Gear pump; 10. Solenoid valve; 11. Step - type storage drawer; 1101. Intercepting net; 12. Receiving tray; 1201. Spring rod; 1202. Wheel seat; 1203. Detection pulley; 1204. Resistance rod; 1205. Monitoring slip ring. Detailed implementation mode

[0019] In order to make the purpose, scheme and advantages of the technical scheme of the present invention clearer, the technical scheme of the embodiments of the present invention will be clearly and completely described below in conjunction with the attached drawings of the specific embodiments of the present invention.

[0020] Embodiment 1: Please refer to the attached drawings in the specification, Figures 1 to 8 as shown: The present invention provides a screw spiral surface milling machine for a twin - screw pump, including: a base 1, two groups of columns 101 are fixedly arranged on the top of the base 1, a cross - translation device 2 is fixedly arranged on the top of the column 101, a cross - translation seat 203 is slidably arranged on the front side of the cross - translation device 2, a vertical - translation device 3 is fixedly arranged on the front side of the cross - translation seat 203, a milling cutter 303 is fixedly arranged below the front side of the vertical - translation device 3, and a milling cutter is installed at the bottom end of the milling cutter 303; a sprayer 304 is installed at one side position of the bottom end of the vertical - translation device 3, and the sprayer 304 is inclined and faces the milling cutter; a chuck frame 5 is fixedly arranged at the right end of the top of the base 1, a push - control rod group 503 is slidably arranged in the chuck frame 5, and an outer ring of bearing A504 is fixedly arranged at the left end of the push - control rod group 503; a driving chuck 6, a chuck shaft 601 is integrally arranged in the middle of the right end of the driving chuck 6, and the chuck shaft 601 is rotatably arranged in the middle of the chuck frame 5 by cooperating with two groups of bearings; three chutes are arranged on the side of the driving chuck 6, a connecting block 603 is fixedly arranged at the outer end of the middle of each chute, a hydraulic piston B606 is fixedly arranged on the right side of each connecting block 603, a spring is sleeved on the telescopic end of each hydraulic piston B606, and a bearing outer ring B607 is fixedly arranged at the telescopic end of each hydraulic piston B606; the bearing outer ring B607 is aligned with the bearing outer ring A504, and a thrust ball bearing is formed by arranging a cage and balls between the bearing outer ring B607 and the bearing outer ring A504; a step - type storage drawer 11 is embedded in the middle of the top of the base 1; a receiving tray 12 is fixedly arranged on the top of the base 1.

[0021] Among them, a chuck lead screw 102 is rotatably arranged on the upper left side of the base 1, and a control handwheel 103 is rotatably arranged above the left side of the base 1. The control handwheel 103 is connected to the chuck lead screw 102 by a gear drive; a chuck seat 104 is slidably installed above the left side of the base 1, and the chuck seat 104 is threadedly connected to the chuck lead screw 102; a moving chuck 4 is rotatably arranged on the right side of the chuck seat 104, and the centers of the moving chuck 4 and the driving chuck 6 are aligned.

[0022] Among them, a cross-feed lead screw 201 is arranged on the front side of the cross-feed device 2, and a cross-feed motor 202 for driving the cross-feed lead screw 201 is arranged at one end of the cross-feed device 2. The cross-feed lead screw 201 is threadedly connected to the cross-feed base 203; a vertical-feed lead screw 301 is rotatably arranged on the front side of the vertical-feed device 3, and a vertical-feed motor 302 for driving the vertical-feed lead screw 301 is arranged at one end of the vertical-feed device 3. The vertical-feed lead screw 301 is also threadedly connected to the cross-feed base 203.

[0023] Among them, a control lead screw 501 is rotatably arranged above the chuck holder 5, and a handwheel is arranged at one end of the control lead screw 501; a rotary motor 502 is fixedly arranged at the bottom of the chuck holder 5, and a driving gear disc 602 is fixedly arranged outside the chuck shaft 601. A bevel gear is arranged at the shaft end of the rotary motor 502 and is in transmission connection with the driving gear disc 602; the top of the push control rod group 503 turns forward and upward, and the middle of the push control rod group 503 is a nut structure and is threadedly connected to the control lead screw 501.

[0024] Among them, at one end of the connecting block 603 close to the center of the driving chuck 6, a hydraulic piston A604 is fixedly arranged, and a clamping block 605 is fixedly arranged at the telescopic end of the hydraulic piston A604; the hydraulic piston A604 and the hydraulic piston B606 are connected by a pipeline and hydraulic oil is filled in the pipeline.

[0025] Among them, a linkage gear ring 7 is fixedly arranged outside the driving chuck 6; a driven gear 8 is rotatably arranged above the base 1, and the driven gear 8 meshes with the linkage gear ring 7; a gear pump 9 is installed above the base 1, and the rotating shaft of the driven gear 8 is in transmission connection with the gear pump 9; the water outlet of the gear pump 9 is provided with a tee pipeline connected to two groups of solenoid valves 10.

[0026] Among them, the stepped storage drawer 11 is a stepped structure with a deeper front and a shallower rear, and an intercepting net 1101 is fixedly arranged at the transition; the water inlet pipe of the gear pump 9 is connected to the front pool inside the stepped storage drawer 11.

[0027] Among them, the rear side of the receiving tray 12 is a guiding groove structure extending backward, the inside of the receiving tray 12 is higher in the front and lower in the rear, and the rear end of the receiving tray 12 is located above the rear side of the receiving tray 12; for the two groups of solenoid valves 10, one group of solenoid valves 10 is connected to a pipeline outside to a spray head 304, and the other group of solenoid valves 10 is connected to a pipeline outside to the upper side of one side of the receiving tray 12.

[0028] Among them, spring rods 1201 are slidably limited on both sides of the receiving tray 12. Springs are sleeved on the tops of the spring rods 1201 and wheel seats 1202 are fixedly arranged. Two groups of detection pulleys 1203 are rotatably arranged above the wheel seats 1202; two groups of resistance rods 1204 are fixedly arranged at the bottoms of the limiting structures below the spring rods 1201, and the tops of the two groups of resistance rods 1204 are connected; two groups of monitoring slip rings 1205 are arranged on both sides of the receiving tray 12, and the resistance rods 1204 slide within the monitoring slip rings 1205.

[0029] As Figures 1 - 6 shown, during assembly, the screw shaft is placed between the moving chuck 4 and the driving chuck 6. One end of the screw shaft is fixed by the moving chuck 4, and the other end of the screw shaft is fixed by the driving chuck 6; During installation, rotate the control lead screw 501 to drive the push control rod group 503 to move forward, push the bearing outer ring A504 and the bearing outer ring B607 to move forward, squeeze the hydraulic piston B606 to input the hydraulic oil in the hydraulic piston B606 into the hydraulic piston A604, expand the hydraulic piston A604 to move the clamping block 605 towards the screw shaft, and fix it by the centering and approaching of the three-way clamping block 605; The thrust ball bearing adopts a design that can withstand thrust loads during high-speed operation and is composed of washer-shaped rings with raceways for ball rolling. The thrust ball bearing composed of the bearing outer ring A504, the bearing outer ring B607, and the cage and balls between them provides axial load-bearing capacity; the shape and model of the cage and balls can be adjusted as needed; The conventional chuck is controlled by a control structure on one side, and it is necessary to ensure that the control structure is above the chuck for convenient control. Using the driving chuck 6 can be more convenient for control; The transverse movement motor 202 drives the transverse movement lead screw 201 to rotate, which can control the horizontal movement of the transverse movement seat 203; The vertical movement motor 302 drives the vertical movement lead screw 301 to rotate, which can move the vertical movement device 3, the milling cutter 303, and the nozzle 304 up and down; Through the dual-axis movement function, drive the milling cutter 303 to approach the screw shaft for milling. At the same time, start the rotation motor 502 to drive the driving gear disk 602 to rotate, so that the whole driving chuck 6 rotates, driving the screw shaft to rotate; The driving chuck 6 drives the linkage gear ring 7 to rotate, the linkage gear ring 7 drives the driven gear 8 to rotate, and the rotating shaft of the driven gear 8 drives the gear pump 9 to work for pumping water; Under normal conditions, one group of solenoid valves 10 is opened and the other group is closed. The water output by the gear pump 9 passes through the opened solenoid valves 10 and is input into the receiving tray 12; the opened solenoid valves 10 are closed, and the other group of solenoid valves 10 is opened. The gear pump 9 works to deliver the water to the nozzle 304 for spraying, continuously spraying the milling cutter, continuously cooling, maintaining the temperature of the milling cutter, and extending the service life of the milling cutter; The water sprayed by the nozzle 304 can also wash away most of the waste chips milled outside the screw shaft. The water and waste chips fall on the top of the receiving tray 12 and slide backward; The waste chips and water fall into the stepped storage drawer 11. The waste chips are intercepted by the interception net 1101 at the rear side of the stepped storage drawer 11, and the water flows to the front side of the stepped storage drawer 11 and is pumped again by the gear pump 9 to achieve circulation; Subsequently, the waste chips can be recycled at the rear side of the stepped storage drawer 11.

[0030] Embodiment 2: On the basis of Embodiment 1, as Figure 8 shown, both the control handwheel 103 and the handwheel outside the control lead screw 501 can be replaced with motors. After fixing the motors, they can be driven to replace manual driving, fix the screw shaft faster, and improve the disassembly and assembly efficiency. This configuration can be replaced under the condition that the cost permits; The moving chuck 4 is a configuration of a low-end machine tool. After increasing the cost, the driving chuck 6 can be used instead to achieve double-end automatic fixation. The size can be preset in advance according to different sizes of the screw shaft.

[0031] Embodiment 3: On the basis of Embodiment 1, as Figure 7 shown, two groups of monitoring slip rings 1205 are used to communicate with the resistance rod 1204 to transmit signals. During the rotation of the screw shaft, the detection pulley 1203 rotates in contact with the screw shaft; If the screw shaft is eccentric or externally bent, the detection pulley 1203 moves along with the spring outside the spring rod 1201, driving the resistance rod 1204 to slide within the monitoring slip ring 1205, and the resistance changes, so that the normal rotation of the screw shaft can be monitored; This function can be used to detect first when installing the screw shaft to determine whether the screw shaft is placed correctly. If the deviation is large, it can be checked whether the fixing accessories are faulty.

[0032] The specific usage method and function of this embodiment: In the present invention, when in use, the screw shaft is placed between the moving chuck 4 and the driving chuck 6. One end of the screw shaft is fixed by the moving chuck 4, and the other end of the screw shaft is fixed by the driving chuck 6; During installation, rotating the control screw 501 drives the push control rod group 503 to move forward, pushing the bearing outer ring A504 and the bearing outer ring B607 forward. The thrust ball bearing formed by the bearing outer ring A504 and the bearing outer ring B607 provides axial load-bearing capacity, squeezing the hydraulic piston B606 to input the hydraulic oil in the hydraulic piston B606 into the hydraulic piston A604, expanding the hydraulic piston A604 to move the clamping block 605 toward the screw shaft, and fix it by centering and approaching the three-way clamping block 605; This completes the fixing of the screw shaft; The traverse motor 202 drives the traverse screw 201 to rotate, which can control the horizontal movement of the traverse seat 203. The vertical motor 302 drives the vertical screw 301 to rotate, which can make the vertical device 3, the milling device 303 and the nozzle 304 move up and down, and drive the milling device 303 to approach the screw shaft for milling. At the same time, the rotation motor 502 is started to drive the driving gear plate 602 to rotate, so that the driving chuck 6 rotates as a whole, driving the screw shaft to rotate; the driving chuck 6 drives the linkage gear ring 7 to rotate, and the linkage gear ring 7 drives the driven gear 8 to rotate. The rotating shaft of the driven gear 8 drives the gear pump 9 to work and pump water. Under normal circumstances, one group of solenoid valves 10 is open and the other group of solenoid valves 10 is closed. The water output by the gear pump 9 passes through the opened solenoid valve 10 and is input into the receiving disk 12; During milling, the opened solenoid valve 10 is closed, and the other set of solenoid valves 10 is opened. The gear pump 9 works to deliver water to the nozzle 304 for spraying, continuously spraying the milling cutter and continuously cooling it; The water sprayed by the nozzle 304 can also wash away most of the waste chips produced by milling outside the screw shaft. The water and waste chips fall to the top of the receiving tray 12 and slide backward. The waste chips and water fall into the stepped storage drawer 11. The waste chips are intercepted by the interception net 1101 at the rear side of the stepped storage drawer 11. The water flows to the front side of the stepped storage drawer 11 and is pumped again by the gear pump 9 to realize circulation. After the screw shaft is installed, the screw shaft fits in with the detection pulley 1203, and two sets of monitoring slip rings 1205 are used to connect with the resistance rod 1204 to transmit signals. During the rotation of the screw shaft, the detection pulley 1203 fits in with the screw shaft and rotates. If the screw shaft is eccentric or bent on the outside, the detection pulley 1203 moves with it through the spring outside the spring rod 1201, driving the resistance rod 1204 to slide in the monitoring slip ring 1205, and the resistance changes, so that it can be monitored whether the screw shaft rotates normally.

Claims

1. Screw spiral surface milling machine for twin-screw pump, characterized in that Comprising: A base (1), on the top of the base (1), two groups of upright columns (101) are fixedly arranged. At the top of the upright columns (101), a transverse movement device (2) is fixedly arranged. A transverse movement seat (203) is slidably arranged on the front side of the transverse movement device (2). On the front side of the transverse movement seat (203), a vertical movement device (3) is fixedly arranged. Below the front side of the vertical movement device (3), a milling cutter (303) is fixedly arranged. A milling cutter is installed at the bottom end of the milling cutter (303); on one side position at the bottom end of the vertical movement device (3), a spray head (304) is installed. The spray head (304) is inclined and faces the milling cutter; On the right end of the top of the base (1), a chuck holder (5) is fixedly arranged. A push control rod group (503) is slidably arranged in the chuck holder (5). At the left end of the push control rod group (503), an outer ring of bearing A (504) is fixedly arranged; A driving chuck (6), in the middle of the right end of the driving chuck (6), a chuck shaft (601) is integrally arranged. The chuck shaft (601) is rotatably arranged in the middle of the chuck holder (5) with two groups of bearings in cooperation; on the side of the driving chuck (6), three chutes are arranged. At the outer end near the middle of each chute, a connecting block (603) is fixedly arranged. On the right side of each connecting block (603), a hydraulic piston B (606) is fixedly arranged. Springs are sleeved outside the telescopic ends of the hydraulic pistons B (606). At the telescopic ends of the hydraulic pistons B (606), outer rings of bearing B (607) are fixedly arranged; the outer rings of bearing B (607) and the outer ring of bearing A (504) are aligned. Between the outer ring of bearing B (607) and the outer ring of bearing A (504), a cage and balls are arranged to form a thrust ball bearing; In the middle of the top of the base (1), a stepped storage drawer (11) is embedded; on the top of the base (1), a receiving tray (12) is fixedly arranged.

2. The screw spiral surface milling machine for a twin-screw pump according to claim 1, characterized in that, On the left side of the top of the base (1), a chuck lead screw (102) is rotatably arranged. Above the left side of the base (1), a control handwheel (103) is rotatably arranged. The control handwheel (103) is connected with the chuck lead screw (102) by gear transmission; above the left side of the base (1), a chuck seat (104) is slidably installed. The chuck seat (104) is threadedly connected with the chuck lead screw (102); on the right side of the chuck seat (104), a movable chuck (4) is rotatably arranged. The movable chuck (4) and the center of the driving chuck (6) are aligned.

3. The screw spiral surface milling machine for a twin-screw pump according to claim 1, characterized in that On the front side of the transverse movement device (2), a transverse movement lead screw (201) is arranged. At one end of the transverse movement device (2), a transverse movement motor (202) for driving the transverse movement lead screw (201) is arranged. The transverse movement lead screw (201) is threadedly connected with the transverse movement seat (203); on the front side of the vertical movement device (3), a vertical movement lead screw (301) is rotatably arranged. At one end of the vertical movement device (3), a vertical movement motor (302) for driving the vertical movement lead screw (301) is arranged. The vertical movement lead screw (301) is also threadedly connected with the transverse movement seat (203).

4. The screw spiral surface milling machine for a twin-screw pump as described in claim 1, wherein Above the chuck holder (5), a control lead screw (501) is rotatably arranged, and a hand wheel is arranged at one end of the control lead screw (501); at the bottom of the chuck holder (5), a rotary motor (502) is fixedly arranged. An actuating gear disk (602) is fixedly arranged outside the chuck shaft (601). A bevel gear is arranged at the shaft end of the rotary motor (502) and is in transmission connection with the actuating gear disk (602); the top of the push control rod group (503) turns forward and upward. The middle of the push control rod group (503) is a nut structure and is in threaded connection with the control lead screw (501).

5. The screw spiral surface milling machine for a twin-screw pump according to claim 1, characterized in that, At one end of the connecting block (603) close to the center of the driving chuck (6), a hydraulic piston A (604) is fixedly arranged, and a clamping block (605) is fixedly arranged at the telescopic end of the hydraulic piston A (604); the hydraulic piston A (604) and the hydraulic piston B (606) are connected by a pipeline and hydraulic oil is filled in the pipeline.

6. The screw spiral surface milling machine for a twin-screw pump according to claim 1, characterized in that, A linkage gear ring (7) is fixedly arranged outside the driving chuck (6); above the base (1), a driven gear (8) is rotatably arranged, and the driven gear (8) meshes with the linkage gear ring (7); above the base (1), a gear pump (9) is installed. The rotating shaft of the driven gear (8) is in transmission connection with the gear pump (9); a tee pipeline is arranged at the water outlet of the gear pump (9) and is connected to two groups of solenoid valves (10).

7. The screw spiral surface milling machine for a twin-screw pump according to claim 6, characterized in that, The stepped storage drawer (11) is a stepped structure with a deeper front and a shallower rear, and an intercepting net (1101) is fixedly arranged at the transition; the water inlet pipe of the gear pump (9) is connected to the front side pool of the stepped storage drawer (11).

8. The screw spiral surface milling machine for a twin-screw pump according to claim 7, characterized in that, The rear side of the receiving tray (12) is a guiding groove structure extending backward. The inside of the receiving tray (12) is higher at the front and lower at the rear. The rear end of the receiving tray (12) is located above the rear side of the receiving tray (12); for the two groups of solenoid valves (10), for one group of solenoid valves (10), a pipeline is arranged outside and connected to the nozzle (304), and for the other group of solenoid valves (10), a pipeline is arranged outside and connected to the upper side of one side of the receiving tray (12).

9. The screw spiral surface milling machine for a twin-screw pump according to claim 1, characterized in that, On both sides of the receiving tray (12), spring rods (1201) are slidably limited. Springs are sleeved on the tops of the spring rods (1201), and wheel seats (1202) are fixedly arranged. Above the wheel seats (1202), two groups of detection pulleys (1203) are rotatably arranged; at the bottom of the limiting structures below the spring rods (1201), two groups of resistance rods (1204) are fixedly arranged, and the tops of the two groups of resistance rods (1204) are connected; on both sides of the receiving tray (12), two groups of monitoring slip rings (1205) are arranged, and the resistance rods (1204) slide in the monitoring slip rings (1205).

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