34results about How to "Short parking time" patented technology

The invention discloses a driverless train positioning failure rescue method. When positioning equipment breaks down and a positioning failure happens to a train-mounted ATP, the following steps are executed that firstly, emergency braking parking is immediately performed by the train-mounted ATP, and the fault information of the positioning equipment is reported to a trackside ATP; secondly, after the trackside ATP acquires the fault information, reported by the train-mounted ATP, of the positioning equipment, a train is locked from a positioning failure position to the area of a station / evacuation platform, and after other trains all drive out of a locking area, real-time movement authority is sent to the train-mounted ATP, wherein the real-time movement authority includes command validtime and allowable running speed; thirdly, after the train-mounted ATP receives the real-time movement authority, the train is controlled to move according to the authority; fourthly, when the trackside ATP obtains the information that the train drives into the station / evacuation platform through a secondary train detection device, sending of the movement authority is stopped. By means of the method, the recovery process can be immediately started after positioning faults of the equipment occur, the time that the train is parked in an interval is short, and influences on passengers are small.

The invention discloses a solvent-resistant and corrosion-resistant rubber and a preparation method thereof. The solvent-resistant and corrosion-resistant rubber consists of the following parts by mass: 30-50 parts of natural rubber, 20-30 parts of nitrile rubber, and 20-30 parts of fluorosilicone rubber 30 parts, 3-7 parts of active zinc oxide, 3-9 parts of PE wax, 4-10 parts of n-butyl methacrylate, 3-8 parts of epoxy resin, 0.3-1.2 parts of anti-aging agent, 1-part of resorcinol 3 parts, polytetrafluoroethylene 6‑10 parts, coumarone resin 2‑5 parts, stearic acid 3‑6 parts, white carbon black 8‑15 parts, sulfur 10‑15 parts, accelerator AM‑2 3‑ 5 parts, 0.1-0.3 parts of anti-scorch agent CTP, the present invention is prepared by two-stage mixing method. The solvent-resistant and corrosion-resistant rubber of the invention has good resistance to organic solvents, strong acid and alkali resistance, corrosion resistance, excellent wear resistance and high temperature resistance, simple preparation, low cost and certain promotion value.

The invention discloses a precise positioning system of an industrial sewing machine and a working method of the precise positioning system and relates to a positioning system of a sewing machine and a working method of the positioning system. The general phenomena of low stop precision, reversal, shaking, poor stability and the like are caused by a reason that the conventional industrial normal sewing machine positioning method generally adopts an adjustment system with a closed-loop position. The precise positioning system is characterized in that a controller comprises a quick reverse-dragging braking module, a speed adjustment module, a torque feedforward module and a three-phase short-circuit controllable stopping module. According to the technical scheme provided by the invention, the quick reverse-dragging braking module is adopted to enable a servo motor to be deaccelerated quickly, and the speed adjustment module is used for stabilizing the speed within a range; when the sewing machine starts to be positioned near to a trimming point, the sudden load change is maximum, and the torque feedforward module supplies a forward dragging torque in advance to counteract the sudden load change during trimming; when a head of the sewing machine is positioned near to a needle stopping point, the three-phase short-circuit controllable stopping module brakes a three-phase short circuit, so that the problems of inaccurate needle stopping and needle stopping shake, which are caused by reverse-dragging braking, can be solved.

The invention belongs to means of transportation, particularly relates to a framework translation rotary intelligent parking device, and comprises a front long vertical beam (1), an upper transverse beam (2), a rear long vertical beam (49), rear-middle transverse beams (18 and 53), rear short vertical beams (54 and 17), an upper connection beam (22), a lower connection beam (23), an inclined connection beam (48), an upper inclined beam (30), a middle beam (8), an upper beam (4), a motor installation frame (29), a lifting motor (34), a driving motor (47), a rail (21), a parking bedplate (7), afirst steel wire rope (33), a second steel wire rope (38) and a third steel wire rope (43). A parking method and the parking device have the advantages of simple and reliable structure, light weight of whole machine, small occupied space, low manufacture cost, stable lifting, short parking time and the like. In addition, the whole machine is contacted with the ground through multiple points, the parking bedplate can be lifted simultaneously through multiple points, and the stress state of a mechanism is good.

The invention discloses a synchronous transporting device of a double trolley. The transporting device comprises two self-propelled trolleys transporter (1), a left rail (2), a right rail (5) and an electronic control cabinet (9). The two self-propelled trolleys transporting device(1)are hung respectively on the left rail (2) and the right rail (5). Each self-propelled trolley transporting device comprises a trolley (11), a chain hoist (12), a shear mode balance mechanism (13) and a lifting appliance (14). The trolley (11), the chain hoist (12), shear mode balance mechanism (13) and the lifting appliance (14) are connected successively. The electronic control cabinet (9) is provided with a programmable logic controller (PLC) which is connected with the two self-propelled trolleys transporting (1) to form an electric control loop through a wire (8). The transporting device has the advantages of being small in weight, small in inertia, high in locating precision, little in auxiliary time, safe and reliable, low in cost, convenient to maintain and long in service life, being capable of adapting to quick-beat transportation and being applied to pretreatment electrophoresis transporting device of a large-scale workpiece.

The invention discloses a comprehensive parking garage of an underground space, which is a novel parking garage built at the peripheral positions alongside a superstore, an entertainment place, a meeting place and a commercial building. The comprehensive parking garage consists of a ground garbage 1, an underground garbage 2, a vertical passage 3, a rotating wagonbox 4, a parking platform 5, a parking berth 6, a track dismantling device 7, a lifter 8 and a garbage canopy 8. The parking garbage is a three-dimensional parking garbage which is built on the ground and underground at the same place so that the parking garbage utilizes the area of scarce and expensive land to the maximum extent; in addition, when the parking amount is the same, the height and the depth of the parking garbage are only one second of those of a parking garbage which is only arranged on the ground or under ground, so that the time consumed by parking and taking vehicles at the highest layer and the lowest layer is improved by one half; and the invention has short time for parking and taking the vehicles and energy-saving effect and also reduces the difficulty for building the parking garbage.

The heater comprises a heating component (3) that is placed in a recess in the coupling head (1) and covered towards the outside. The recess is precision fitted to the diameter of the heating component such that it is removably affixed to the coupling head. The linear recess is oriented parallel to the faceplate (2) of the coupling head.

The invention discloses a hydraulic walking mechanism for a tunnel lining working jumbo and a control method. Hydraulic motors on the left side and the right side of a hydraulic oil driver of a hydraulic pump station are connected and then connected with drive wheel axles on the left side and the right side through couplers, so the jumbo is driven to walk; in order to make the jumbo advance or retreat, bidirectional quantitative hydraulic motors are adopted as the hydraulic motors, and the hydraulic motors are rotated forward or backward by changing the flowing direction of hydraulic oil in the hydraulic motors; in order to synchronously control a left drive wheel and a right drive wheel of the jumbo, through signals of pressure sensors between a proportional electromagnetic valve and the hydraulic motors and encoders on driven wheels, the proportional electromagnetic valve is controlled so as to control the rotating speed of the hydraulic motors; a drive mechanism adopted by the hydraulic walking mechanism is simple in structure, high in reliability and convenient to control.

The invention provides a vehicle driving path dynamic navigation method based on a green light moment map, which can reduce the parking times and driving delay of a red light on a road and effectivelyimprove the reliability and stability of travel navigation. In the technical scheme of the invention, the final arrival time and the parking frequency of each feasible path are obtained based on thegreen light starting and ending time of each lamp control intersection on the path and the spatial distance between the lamp control intersections, and then the path evaluation index is established based on the path length, the final arrival time and the parking frequency of each feasible path, an optimal candidate path is obtained, and the to-be-navigated vehicle can be ensured reach the destination with the shortest driving time and the minimum energy consumption on the basis of considering the shortest path.

The invention aims to solve the problem that a parking time is too long due to an unreasonable parking path of a parking lot, and provides a parking lot parking path optimization system based on 5G and the Internet of Things. The system comprises an information management platform, a parking space management platform and a path management platform, and is characterized in that the information management platform is in data connection with the parking space management platform and the path management platform. According to the invention, the parking lot parking path optimization problem is mainly studied, the optimal parking space is searched by means of an algorithm model, and the state of the parking space in the parking lot is detected in real time through the 5G and Internet of Things technology, so that the data transmission speed is increased, and the data transmission of vehicles is enhanced.

The invention aims at providing furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin for a resin grinding tool and a preparation method of the furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin, wherein the furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin is proper in molar ratio, high in solid content, good in water solubility, low in free phenol content, stable in performance and reduced in performance degradation. The furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin comprises the following components in parts by mass: 100 parts of phenol, 10-35 parts of furfuralcohol, 120-180 parts of formaldehyde, 10-30 parts of urea, 1-10 parts of a moisturizing agent, 1.2-3.0 parts of an alkaline catalyst and 0.1-2 parts of a novel coupling agent. The preparation method of the phenol-formaldehyde resin comprises the following steps of (1) adding phenol, formaldehyde and part of furfuralcohol; (2) adding the alkaline catalyst; (3) heating; (4) adding part of the urea; (5) heating, adding the left furfuralcohol and urea, and stirring until the water solubility conforms to the standard; (6) cooling, reducing water, dehydrating, and adding the novel coupling agent; and (7) and carrying out reduced-pressure dehydration to obtain the furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin. The furfuralcohol and urea composite modified water-soluble phenol-formaldehyde resin is applied to the field of friction materials.

The present invention provides a load commutation inverter drive electrically excited synchronous motor rapid parking method. When a current common large-power synchronous motor braking method employsan energy consumption braking method, energy is consumed on an external resistor, the volume of the external power resistor is large, and the occupation area is large. When a motor rotating speed ishigh, the method employs a LCI starting device and a method of braking feedback is employed to perform feedback of the kinetic energy of the motor to a power grid to rapidly stop the motor; and when the motor rotating speed is low, the energy braking method is employed to consume the energy in a motor winding to rapidly stop the motor. The method is shorter in required time for completing parking,and is especially suitable for the electrical dragging occasions requiring frequent starting and stopping.

The invention provides an intelligent parking lot. The parking lot comprises parking platforms which are used for parking vehicles, an intelligent control device, a driving device, and a voice device;the parking platforms comprise an inner parking platform and an outer parking platform; the outer parking platform is movably disposed at the outer side of the inner parking platform and can rotate relative to the inner parking platform; the intelligent control device is used for full-automatic parking and taking of a vehicle after the vehicle is parked on a lifting platform; the driving device is connected with the parking platforms and used for driving the parking platforms to rotate independently in different directions; and the voice device can identify voice and send an indication command to the intelligent parking lot. When the intelligent parking lot is used, a user sends a vehicle parking and taking request through a mobile phone APP, and an intelligent control device drives the parking platforms to rotate, so that a first passing lane and a second passing lane rotate to the same direction to form a same driving channel, and rotate to the same azimuth angle as a lifting deviceat the same time. A concentric circle principle is adopted, parking spaces and lanes are combined, and full-automatic vehicle parking and picking-up are started, so that resources are fully utilized,and the problem that the vehicles are difficult to park and pick up can be effectively solved.

The invention provides a dynamic navigation method for vehicle driving paths based on a green light time map, which can reduce the number of stops and driving delays when encountering a red light, and effectively improve the reliability and stability of travel navigation. In the technical solution of the present invention, based on the start and end time of green lights of each light-controlled intersection on the path and the space distance between light-controlled intersections, the final arrival time and number of stops of each feasible path are obtained, and then based on the path of each feasible path Length, final arrival time, number of stops, establish a route evaluation index, and obtain the best candidate route; ensure that the vehicle to be navigated can take into account the shortest route, and use the shortest driving time and minimum energy consumption to reach the destination.

The invention proposes a vehicle and automatic parking method and system. The automatic parking method includes the following steps: collecting surrounding obstacle information and free parking space information through ultrasonic radar, and collecting line parking space information of the free parking space through a camera; obtaining Vehicle position information and vehicle status information; generate multiple planned trajectories based on surrounding obstacle information, vehicle location information, free parking space information, free parking space line parking space information and vehicle status information, and provide multiple planned trajectories to the user; Receive the target planning trajectory selected by the user and perform automatic parking according to the target planning trajectory. This automatic parking method collects information simultaneously through ultrasonic radar and panoramic cameras, and can not only detect obstacles but also parking space lines, solving the limitations and low detection accuracy of automatic parking in the existing technology. problems and improve the automation of parking.

The invention belongs to the technical field of guaiacol preparation, in particular to a technique and an installation for preparing guaiacol by continuously hydrolyzing diazonium salt of o-amino pheylmethyl ether, which solves the problems of the prior guaiacol production method, including low efficiency, high energy consumption, severe pollution and difficult continuous production. The installation comprises a hydrolysis reactor which consists of a rotating packed bed and a coil, the coil is axially vertically arranged under the rotating packed bed, a liquid outlet of the rotating packed bed is connected with a coil inlet, and a coil outlet is sequentially connected with a stirrer, a condenser and an output liquid storage tank. The method includes the following steps that: hydrolysate and extractant are mixed and preheated, and are then sent into the hydrolysis reactor along with the diazonium salt solution of o-amino pheylmethyl ether at the same time and heated to the hydrolysis temperature, so that the guaiacol is produced. The invention has the following advantages that: the production of by-products can be reduced, the yield is increased to more than 90 percent, the emission of the three wastes is reduced, the production cost is reduced, moreover, the equipment size is small, the startup / shutdown time is short, and mounting, operation and maintenance are convenient.

The invention discloses a precise positioning system of an industrial sewing machine and a working method of the precise positioning system and relates to a positioning system of a sewing machine and a working method of the positioning system. The general phenomena of low stop precision, reversal, shaking, poor stability and the like are caused by a reason that the conventional industrial normal sewing machine positioning method generally adopts an adjustment system with a closed-loop position. The precise positioning system is characterized in that a controller comprises a quick reverse-dragging braking module, a speed adjustment module, a torque feedforward module and a three-phase short-circuit controllable stopping module. According to the technical scheme provided by the invention, the quick reverse-dragging braking module is adopted to enable a servo motor to be deaccelerated quickly, and the speed adjustment module is used for stabilizing the speed within a range; when the sewing machine starts to be positioned near to a trimming point, the sudden load change is maximum, and the torque feedforward module supplies a forward dragging torque in advance to counteract the sudden load change during trimming; when a head of the sewing machine is positioned near to a needle stopping point, the three-phase short-circuit controllable stopping module brakes a three-phase short circuit, so that the problems of inaccurate needle stopping and needle stopping shake, which are caused by reverse-dragging braking, can be solved.

The invention relates to an air-flow spinner having a plurality of identical work stations, wherein each work station (1) comprises: at least an air-flow spinning device for producing a yarn; a winding device with a creel, a yarn cross-winding device for producing a cross-winding pony roll; a vacuum-chargeable, pivotably seated suction nozzle; a device for preparing a yarn end for piecing again, and a yarn guide device fixed thereon. According to the invention, the yarn guide device and a yarn catch element (7) fixed on the nozzle (4) and being movable by the nozzle cooperatively retrieve the yarn (9) from the cross-winding pony roll (8) and return the yarn to the spinning device (2).

The invention relates to the field of bicycle stereo garages, and particularly to an automatic bicycle entering device used for a standard bicycle stereo garage. The automatic bicycle entering device comprises a garage floor and a garage wallboard, wherein a bicycle inlet is formed in the middle of the garbage wallboard; a lane with the front end extending to the bicycle inlet is arranged on the garage floor, a first sensor is arranged in the lane, and a fixing device which matches with the lane and can be lifted and dropped is arranged at the terminal end of the lane; first oil cylinders are arranged at the inner side of the garage wallboard which is located at the two sides of the bicycle inlet, sliding blocks are connected to the push rods of the first oil cylinders, a second oil cylinder 2 is arranged on one side of each sliding block which points towards the orbit; a locking semi-ring is connected to the push rods of the second oil cylinders respectively, and the locking semi-rings match with pipeline levers of bicycles. The purpose of the invention is to provide the automatic bicycle entering device used for the standard bicycle stereo garage, standard bicycles can be sent to the fixing device for fixation automatically, and parking time is saved greatly as the automatic operation is adopted.

The invention discloses a forced cooling process and device for the regeneration process. The forced cooling process is characterized by including a regeneration starting stage, a regeneration constant-temperature stage, a regeneration cooling stage and a normal production stage. The device structurally comprises a fluidized bed 101 and a steam water atomizer 103, a gas inlet at the bottom of the fluidized bed 101 is connected with a first pipeline 1 while a gas outlet at the top of the same is connected with a second pipeline 2, a hot water circulating pipe 102 is arranged in the fluidized bed 101, and an inlet of the hot water circulating pipe 102 is connected with a third pipeline 3 while an outlet of the same is connected with a fourth pipeline 4; a mixed gas outlet at the top end of the steam water atomizer 103 is connected with a fifth pipeline 5 and connected with the third pipeline 3 through the same while a nitrogen inlet at the bottom end of the same is connected with a seventh pipeline 7 and connected with a nitrogen pipeline through the same, and the end of a hot water incoming pipe 106 on the side face of the steam water atomizer 103 is connected with a sixth pipeline 6 and connected with a hot water system through the same.

The present invention is a kind of forced cooling process and device used in the regeneration process, which is characterized in that it includes the regeneration start stage, the regeneration constant temperature stage, the regeneration cooling stage, and the normal production stage. The structure of the device used is: it includes a fluidized bed 101 The gas inlet at the bottom of the fluidized bed 101 is connected to the first pipeline 1, and the gas outlet at the top is connected to the second pipeline 2. The fluidized bed 101 has a built-in hot water circulation pipe 102, and the inlet of the hot water circulation pipe 102 is connected to the third pipeline. The pipeline 3 is connected, the outlet is connected to the fourth pipeline 4, and a steam-water atomizer 103 is also included. The mixed gas outlet at the top of the steam-water atomizer 103 is connected to the fifth pipeline 5, and the fifth pipeline 5 is connected to the third pipeline 3 Connection, the nitrogen inlet at the bottom of the soda atomizer 103 is connected to the seventh pipeline 7, and connected to the nitrogen pipeline through the seventh pipeline 7, the end of the hot water inlet pipe 106 on the side of the soda atomizer 103 is connected to the sixth pipeline 6, And connect with the hot water system through the sixth pipeline 6.

According to the method, the complex, changing and narrow environment is automatically recognized without human intervention, the parking mode with the simplest route, feasible vehicle conditions and comfortable passengers is calculated, and automatic parking is achieved; a current parking environment is collected and input into a system, a corresponding sensor is matched with an accurate positioning system to draw a parking environment map, more environmental factors are comprehensively considered, and automatic parking is achieved in the environment with narrow space, complex environment and moving objects. An actual parking environment is converted into a model map in the system, an automatic parking path is planned according to calculation, a parking line with high difficulty can be designed in a complex and narrow environment, and the problem that automatic parking cannot be started when the difficulty is high is solved; the parking system is controlled in combination with a PID optimization control strategy, parking is carried out under the conditions of no obstacle, obstacle and the like according to the calculated track, and compared with the prior art, the adaptive capacity to the environment is higher, the efficiency of automatic parking is higher, and the experience is better.

The invention discloses an unmanned train positioning automatic recovery method. When a train-mounted ATP loses the position, the following steps are executed, wherein the following steps include thatfirstly, the train-mounted ATP conducts emergency braking immediately to stop a train, and a trackside ATP estimates the maximum and minimum possible positions of the train according to the final train positioning and the possible movement characteristic of the train; secondly, after the train is stopped, the train-mounted ATP applies positioning initialization authorization to the trackside ATP,and the trackside ATP locks the distance enough for the train to be positioned according to the application of the train-mounted ATP and sends the positioning initialization authorization to the train-mounted ATP after distance locking operation is completed; thirdly, the train-mounted ATP controls the train to move forwards at the specific limited speed according to the authorization, and the train-mounted ATP completes positioning within the authorized distance; and fourthly, after the train-mounted ATP completes positioning, the train is controlled to stop, after the trackside ATP obtainsstop information of the train-mounted ATP, locking is canceled, recovery is conducted, and movement authorization is calculated for the trackside ATP according to a movement blocking principle. By theadoption of the method, a recovery process can be conducted immediately after an equipment positioning fault happens, the stop time of the train in a section is short, and influence on passengers issmall.

The invention belongs to means of transportation, particularly relates to a framework translation rotary intelligent parking device, and comprises a front long vertical beam (1), an upper transverse beam (2), a rear long vertical beam (49), rear-middle transverse beams (18 and 53), rear short vertical beams (54 and 17), an upper connection beam (22), a lower connection beam (23), an inclined connection beam (48), an upper inclined beam (30), a middle beam (8), an upper beam (4), a motor installation frame (29), a lifting motor (34), a driving motor (47), a rail (21), a parking bedplate (7), a first steel wire rope (33), a second steel wire rope (38) and a third steel wire rope (43). A parking method and the parking device have the advantages of simple and reliable structure, light weight of whole machine, small occupied space, low manufacture cost, stable lifting, short parking time and the like. In addition, the whole machine is contacted with the ground through multiple points, the parking bedplate can be lifted simultaneously through multiple points, and the stress state of a mechanism is good.

The invention discloses a composite-forming ultra-light floor roller. The composite-forming ultra-light floor roller comprises a shaft core and a fiber-woven composite layer. An outer cylinder of the shaft core is covered with the structural-fiber-woven composite layer; the shaft core comprises an outer barrel, an inner barrel and supports; the inner barrel and the outer barrel are homocentric, and the multiple supports are arranged between the inner barrel and the outer barrel and evenly distributed between the inner barrel and the outer barrel in a spiral mode; a composite layer comprises a fiber-woven-structure enhancement layer and a pouring layer; the fiber-woven-structure enhancement layer is covered with the pouring layer, is a sleeve mesh-shaped woven fabric woven with composite materials in a weaving machine and comprises a single or multiple players. The composite-forming ultra-light floor roller has the advantages that the mass is light, the strength is high, the rotational inertia is small, the accuracy of the outer cylinder and the extension strength are high, the floor roller is not deformable and not straightened, the outer layer is not fractured, and the formed floor roller is free of mechanical wave, resistant to static electricity, corrosion and high temperature and long in service life; the making processes are reduced, energy is saved, consumption is reduced, the manufacturing cost and the maintaining cost are low, the parking time is short, and the product quality and the production yield are increased.

The invention belongs to the technical field of preparing parahydroxyben-zaldehyde, and more particularly relates to a method for preparing parahydroxyben-zaldehyde by hydrolyzing diazo salt of para aminotenzaldehyde and a device thereof. The invention solves the problems of low efficiency and high energy consumption in the existing method for preparing the parahydroxyben-zaldehyde. The method comprises the steps: reactant is thrown into a rotary packed bed to be heated and then enters a diversion plate type tower, and sent out to be filtered, condensed and filtered again. The device comprises the rotary packed bed and the diversion plate type tower, wherein, a liquid inlet of the rotary packed bed is connected with a liquid storage tank of diazonium, an air inlet is connected with a thermal medium generator, and a liquid outlet is connected with a liquid inlet of the diversion plate type tower; a liquid outlet of the diversion plate type tower is connected with a filter I which is connected with a condenser. The invention has the beneficial effects of easily controlled process, stable operation, uniform product quality, small volume of the device, convenient installation and maintenance and short startup and shutdown time.

The invention provides a vehicle battery replacing platform and a vehicle battery replacing system. The vehicle battery replacing platform comprises a platform main body which is used for providing aparking and battery replacing operation area for a vehicle to be subjected to battery replacing; the platform main body comprises a left side and a right side for a battery replacing device to transport a to-be-replaced battery, and a front side and a rear side for the vehicle to be subjected to battery replacing to run. In the installed state, a conventional driving area for the vehicle to be subjected to battery replacing to run is arranged close to one side of the vehicle battery replacing platform. The system also comprises a rotating base on which the platform main body is disposed; the rotating base is controlled to drive the platform main body to rotate, so that an angle formed by the extending direction of the conventional driving area and the central axis extending from the frontside of the platform main body to the rear side is changed in a working state and a non-working state. The vehicle battery replacing platform and the vehicle battery replacing system are flexible to use, and the compact occupied space arrangement and the convenience degree of battery replacing vehicle parking can be considered.

The invention relates to the field of product machining, in particular to a product surface milling device. The product surface milling device comprises a rack, a product lifting module, a tool bit module and a tool bit moving module; the product lifting module is arranged on the upper side of the rack; the tool bit module is arranged on one side of the product lifting module and fixed to the tool bit moving module; the tool bit moving module is fixed to the upper surface of the rack; the product lifting module comprises a lifting sensing module, a lifting motor, a lead screw lifting machine, a lower pressing plate, an upper pressing plate, a guide column, a spring, a top column, a first base plate and a second base plate; the lifting motor is connected with the lead screw lifting machine; and the lead screw lifting machine is connected with the lower pressing plate. According to the product surface milling device, the black skin removing work of a to-be-milled product is realized, the application range of a cutter is wide, the adjusting speed is high, and the requirements on different milling thicknesses are met.