1325 results about "Machine parts" patented technology

The invention discloses a machining error-oriented hardware part size compensation method and platform, and relates to the technical field of industrial control, in particular to the technical field of hardware part machining. The method comprises the steps that based on a to-be-machined part, structural basic characteristics are obtained, and a three-dimensional size compensation map is drawn up with the elasticity modulus of a material as a constraint; matching each tool path target compensation amount sequence based on the map, and synchronously predicting a size deviation value; introducing an environmental interference factor, and inputting the pre-training model to generate a dynamic correction coefficient; and on the basis of the data, cutter compensation, the feeding rate and the rotating speed are dynamically adjusted through a self-adaptive strategy till the machining error is stabilized within the tolerance range. The technical problem that in traditional hardware part machining, due to the fact that a static compensation strategy is difficult to adapt to a dynamic machining environment, the machining size precision is unstable is solved, and the technical effects that self-adaptive high-precision size compensation based on the real-time machining state and multi-source interference sensing is achieved, and the part machining consistency and the percent of pass are improved are achieved.

The utility model discloses a hub spinning machine which comprises a processing chamber and a hub blank, two opposite sides of the inner wall of the processing chamber are respectively provided with a rough rotary knife and a fine rotary knife, the bottom end of the processing chamber is provided with a piece jacking mechanism and a deviation rectifying mechanism, the top end of the processing chamber is provided with an opposite jacking mechanism, and the opposite jacking mechanism comprises a piece jacking block. The machined part top seat is located in the containing ring, the hub blank is located between the part ejecting block and the machined part top seat, the upper end of the machined part top seat is in the shape of a circular truncated cone, it can be guaranteed that the angle of the hub blank does not deflect when the hub blank is machined, and the yield of finished hub products is increased. The clamping connection is formed by the pressing block and the clamping groove, the power threaded rod and the fixing plate are rotationally connected, the power threaded rod and the meshing threaded rod are connected in a meshing mode, and the meshing threaded rod and the sliding sleeve are rotationally connected, so that it can be guaranteed that a hub blank is stable and does not shake during machining, and the machining quality is guaranteed; and the device can adapt to hub blanks of different models.

The invention discloses a preparation method for ensuring thickness uniformity and form and location tolerance of a coating of a slender shaft, the slender shaft is a slender stepped shaft-shaped part, the preparation method comprises base body processing before plating, hard chromium plating and machining after plating, in the base body processing process stage before plating, a center hole is adopted as a processing reference, finish machining is carried out according to the shape of the part, and the thickness uniformity and the form and location tolerance of the part are guaranteed. It is ensured that the form and position error and dimensional tolerance of the machined part meet the requirements; in the hard chromium plating stage, the non-chromium-plated part is protected, and the chromium-plated part is subjected to hard chromium plating; and in the post-plating machining stage, the center hole is adopted as a machining standard, post-plating rough machining is conducted firstly, then post-plating finish machining is conducted, grinding is conducted to meet the design requirement, and a plated workpiece is obtained. By the adoption of the preparation method, the problem of machining deformation of the slender shaft type structural part is thoroughly solved, the machining performance is stable, the production efficiency is high, special equipment and tools do not need to be configured, and the method is suitable for large-scale production and machining.

The invention discloses a method for predicting the remaining service life of a cylindrical grinding wheel based on acoustic emission signals, which comprises the following steps of: acquiring acoustic emission signal data in the working process of the cylindrical grinding wheel, labeling the acoustic emission signal data according to the number of effective processing parts, and forming a data set by the acoustic emission signal data and labels; constructing an initial model which comprises a data preprocessing module, a multi-scale feature extraction module, a feature fusion module and a prediction module; training the initial model by using the data set to obtain a prediction model for predicting the residual service life of the cylindrical grinding wheel; and inputting acoustic emission signal data during working of the cylindrical grinding wheel into the prediction model so as to output the residual service life of the corresponding cylindrical grinding wheel. The invention further provides a device for predicting the remaining service life of the cylindrical grinding wheel. The method provided by the invention can predict the residual service life of the cylindrical grinding wheel so as to guide production and maintenance, reduce the rejection rate and improve the resource utilization rate.

The utility model relates to the technical field of side groove milling machine clamping, in particular to a clamping device for machining a side groove of a precision part, which comprises a positioning groove, a machining part arranged in the positioning groove, four clamping mechanisms and two moving driving mechanisms. The four clamping mechanisms are arranged at the four corners of a machined part correspondingly, and every two clamping mechanisms are symmetrically arranged. The two moving driving mechanisms are symmetrically arranged on the two opposite sides of the machined part, each moving driving mechanism is connected with the two clamping mechanisms on the corresponding two sides, and the clamping mechanisms are driven to be close to or away from the machined part. The clamping mechanism and the moving driving mechanism are arranged, the clamping mechanism is moved to be close to or far away from a machined part through the moving driving mechanism, so that the machined part is clamped or loosened, the right-angle portion of the machined part is clamped while it is guaranteed that clamping is stable and flexible, the portion where a side groove is formed is avoided, and the machining efficiency is improved. And the part machining efficiency and quality are guaranteed.

The invention relates to the technical field of washing machine part machining, in particular to special punching equipment for a washing machine tripod, the special punching equipment comprises a base frame and a top shell, the top shell is fixedly mounted at the top of the base frame, and a placing mechanism is arranged in the top shell; the placement mechanism comprises a mounting frame fixedly connected to the top of the base frame, a guide disc is fixedly mounted at the top of the mounting frame, three arc grooves are formed in the guide disc in the circumferential direction at equal intervals, three reference rods are fixedly mounted at the top of the guide disc, and a rotary disc is rotationally connected to the interior of the mounting frame; and three positioning rods are fixedly arranged in the circumferential direction of the turntable. Through cooperative cooperation of the guide disc, the reference rod, the rotary disc and the positioning rod and combination of driving of the first motor, rotation adjustment can be automatically conducted on a tripod workpiece with placement deviation, under the limiting effect of the reference rod, the tripod workpiece is accurately aligned to the machining positions of the three drilling units, and the positioning precision and the machining consistency are improved.

The invention belongs to the technical field of cylindrical grinding machine control, and provides a self-adaptive control method and system for a cylindrical grinding machine jacking tailstock. The method comprises the steps that the cone adjusting track of a jacking tailstock is determined based on the geometric structure of a to-be-ground area of a target workpiece, the posture of the jacking tailstock and the posture of a grinding wheel, and a first jacking force sequence set is determined based on the cone adjusting track, the material attribute of the target workpiece and the machining process constraint condition; grinding thermal deformation information corresponding to all track points of the cone adjusting track is obtained through prediction, jacking force correction is conducted on the first jacking force sequence set based on the grinding thermal deformation information, and a second jacking force sequence set is obtained; and in the automatic cone adjusting process, the tailstock is adjusted and controlled according to the cone adjusting track and the second jacking force data set. According to the invention, non-stop automatic cone adjustment and self-adaptive jacking force control of the tailstock in the grinding process are realized, the machining consistency and the automation level can be effectively improved, the service life of equipment can be effectively prolonged, and the device is particularly suitable for machining parts with complex taper structures and high precision requirements.

A shank adapter forming part of a drilling assembly includes a longitudinal axis, an external surface, an internal surface, a threaded part provided at a forward end and a plurality of splines provided at a rearward end. A machine part extends axially between the threaded part and the splines, wherein at least a part of the external surface is coated with a first corrosion protection layer of nickel and at least part of the first corrosion protection layer is coated with a polymer based sealant top layer.

The invention relates to the technical field of motor shaft turning, and discloses a motor shaft production turning device which comprises a machine base, a machine shell is installed on the machine base, a turning assembly used for turning a motor shaft is arranged on the machine base, and a guide rail block is fixedly connected to the top inner wall of the machine shell. The control assembly drives the two moving arms to be matched with the conical clamping heads to be clamped in prefabricated holes in the two ends of the motor shaft, centering clamping is achieved, then the stabilizing devices on the two moving arms can achieve multi-position self-adaptive clamping and supporting of different positions of the motor shaft, center clamping is achieved when the two ends are turned, and two-end clamping is achieved when the center is turned. A machining area avoids a supporting point, rotation of the motor shaft and radial run-out in the turning process can be effectively limited, it is guaranteed that the motor shaft is machined in place at a time in the turning process, time loss and errors caused by multiple times of clamping are reduced, the machining efficiency is remarkably improved, and meanwhile the machining cost is reduced. And the dimensional precision and the coaxiality consistency of all the machining parts of the motor shaft are guaranteed.

1. The name of the design product: shoulder massage instrument main machine (J1). 2. The use of the design product: for the main machine part of the shoulder massage instrument. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention relates to the technical field of automobile accessory machining equipment, and discloses an automobile outside rear-view mirror lens automatic compression joint equipment which comprises a base and a mold block, the top of the base is fixedly connected with a fixing column, a feeding mechanism is arranged on the outer side of the fixing column, and the feeding mechanism is used for conveying a to-be-machined part to the position below a compression joint mechanism; the outer wall of the fixing column is fixedly connected with an automatic pressing mechanism, the automatic pressing mechanism is used for pressing connection of a lens, the outer side of the mold block is provided with a dismounting and replacing mechanism, the dismounting and replacing mechanism is used for replacing molds of rearview mirrors of different specifications, and the feeding mechanism comprises an electric telescopic rod. The electric telescopic rod is started to push the push plate, so that the rotating strip inclines forwards, the outside rear-view mirror base body and the lens to be crimped are placed in the die block station, vibration is buffered and lens displacement is prevented through non-rigid connection of the rotating strip and the push plate, continuous circulation of feeding and discharging is achieved, and manual posture adjustment is not needed.

The utility model discloses a quick positioning and clamping device for slotting machining of internal teeth of disc type workpieces, which relates to the technical field of tooth machining and comprises an expansion sleeve, a positioning seat and a pull rod, a plurality of partition grooves are formed in the outer side of the expansion sleeve in the circumferential direction of the expansion sleeve, and cavities are formed in the upper end and the lower end of the expansion sleeve. The diameter of a cavity in the upper end of the expansion sleeve is matched with the diameter of the lower end of a to-be-machined part. A cavity matched with the expansion sleeve is formed in the upper portion of the positioning seat, and the expansion sleeve is arranged in the cavity in a sliding mode in the axial direction of the expansion sleeve. The pull rod is used for pulling the expansion sleeve to slide downwards and enabling the expansion sleeve to generate elastic deformation to clamp a part to be machined. According to the rapid positioning and clamping device for slotting machining of the inner teeth of the disc type workpiece, the expansion sleeve is pulled by the pull rod to generate elastic deformation to clamp and fix a part to be machined, so that rapid clamping of the part to be machined is achieved, and positioning is accurate and stable.

The invention relates to the technical field of motor machining, in particular to a cutting machine for machining a vehicle motor support. Comprising a machining table, a hydraulic mechanism is arranged above the outer wall of the machining table, a machining groove is formed in the outer wall of the machining table, and a cleaning mechanism is arranged on the outer wall of the machining table and located below the machining groove; the hydraulic mechanism comprises a hydraulic head, a hydraulic rod, a fixing clamp and a to-be-machined part, the hydraulic head is fixedly connected to one side above the outer wall of the machining table, the hydraulic rod is fixedly connected to the driving end of the hydraulic head, the fixing clamp is fixedly connected to the other side above the outer wall of the machining table, and the to-be-machined part is installed on one side of the fixing clamp. The cleaning mechanism comprises a transmission shaft, a driving assembly and a conveying belt, the transmission shaft is rotationally connected below the outer wall of the machining table, the driving assembly can be fixedly connected to the outer wall of the transmission shaft, and the conveying belt is installed on the outer wall of the driving assembly. Compared with the prior art, chippings generated in the machining process of the to-be-machined workpiece are directly received and conveyed through the conveying belt, manual cleaning by hands or cleaning by a dust collector are not needed, and the working efficiency of the device is greatly improved.

The invention relates to the technical field of flaw detection, and discloses a flaw detection device for machining parts of a numerical control machine tool, which comprises a conveying frame with supporting legs, a conveying mechanism is arranged in the conveying frame, the upper surface of one end of the conveying frame is fixedly connected with a detection box, and the two sides of one end, close to a chain plate, of the detection box are provided with entrances and exits; a mounting rod is fixedly connected to the middle of the upper surface of the detection box, the lower end of the mounting rod penetrates into the detection box and is fixedly connected with a mounting block, a visual detection camera is fixedly connected to the bottom surface of the mounting block, a moving mechanism is connected to one side, close to one end of the conveying frame, of the detection box, and an L-shaped plate is connected to the output end of the moving mechanism. According to the flaw detection device for machining the parts of the numerical control machine tool, the L-shaped plate carries a standard part and automatically moves to the position below the camera in a detection gap to complete self-inspection calibration, shutdown maintenance is not needed, and the problem of efficiency loss caused by traditional regular shutdown calibration is solved.

The invention is suitable for the technical field of laser marking, and provides a full-automatic laser marking machine which comprises a workbench, a supporting frame is fixedly connected to the workbench, the supporting frame is connected with a connecting plate through a driving assembly, the driving assembly can drive the connecting plate to move horizontally, and the full-automatic laser marking machine further comprises a laser marking assembly which is fixedly connected with the connecting plate and is connected with the laser marking assembly. The laser marking assembly can conduct marking operation on a machined part through laser. The gas guide mechanism is fixedly connected with the connecting plate, and the gas guide mechanism can spray protective gas to the marking position; and the spraying angle adjusting system is used for optimizing the spraying angle of the protective gas. According to the technical scheme, the limitation of traditional fixed-angle injection is broken through, a multi-dimensional state evaluation model is constructed, and the third motor is driven to dynamically adjust the angle of the air outlet pipe. The angle adjusting model can automatically compensate the spraying angle according to the working condition deviation, it is ensured that gas accurately covers the molten pool area, oxidation is restrained, and smoke dust attachment is reduced.

The invention provides a laser engraving path planning method, system and device and a medium, and relates to the technical field of laser engraving, the method comprises the steps that a preset format file is obtained, and the preset format file comprises a three-dimensional model of a to-be-machined part; performing cross cutting on the three-dimensional model to obtain a plurality of intersection points and a plurality of intersection lines; performing contour reconstruction on the three-dimensional model based on each intersection point and each intersection line to obtain at least one closed region segmentation curve; based on each region segmentation curve, determining an inclusion relation among the region segmentation curves by adopting a Vatti polygon cutting algorithm; establishing a topological relation tree based on inclusion relations among the region segmentation curves; performing region division based on the topological relation tree to obtain a plurality of different processing regions; and for each machining area, a preset filling method is adopted to generate a corresponding carving tool path. According to the method, the machining precision is guaranteed through local intersection point and intersection line processing while the machining area is accurately and rapidly divided to generate the carving tool path.

The invention relates to the technical field of drilling equipment, in particular to a container lock inclined hole drilling device which comprises a machine table body, a station space is arranged in the middle of the machine table body, a lifting arm is arranged in the station space of the machine table body in a lifting mode, drilling machine equipment is installed on the lifting arm, and an arc-shaped plate is arranged below the drilling machine equipment in a matched mode. A drill bit assembly is arranged on the arc-shaped plate, a control mechanism used for driving the arc-shaped plate is arranged on the lifting arm, two cavities are symmetrically formed in the machine table body, electric telescopic rods are horizontally installed in the two cavities correspondingly, butt joint mechanisms matched with the arc-shaped plate are installed on the two electric telescopic rods correspondingly, and drill bit grinding mechanisms are arranged in the two cavities correspondingly. A machined part containing mechanism is arranged at the bottom of the station space of the machine table body. According to the inclined hole drilling device, inclined hole drilling machining can be conducted by changing drill bits of different specifications, the problem that the efficiency of a single drill bit is low is effectively solved, meanwhile, the drill bits can be conveniently replaced, and the working efficiency is effectively improved.

The utility model relates to the technical field of food processing equipment, in particular to multifunctional puffing equipment which is composed of a screw power system, a feeding system, a puffing system, an electromagnetic heating device, a control box and a base. Continuous quantitative feeding is kept under the airtight condition, materials are heated, boosted and cured through electromagnetic heating and pressurizing of the puffing cavity, discharging, continuous quantitative feeding and discharging are achieved through the intelligent pulse type air escape valve under propelling of rotation of the screw, the industrialization degree and the automation degree are improved, and heat loss and noise pollution are reduced. And a forming processing device is additionally arranged at the discharge hole, so that a formed product can be produced. According to the present invention, the airflow puffing principle and the extrusion puffing principle are combined together, such that the defects that the continuous feeding cannot be performed through the airflow puffing and the extrusion puffing machine barrel cannot rotate are overcome, and the heating and pressurization method of the puffing cavity is adopted so as to reduce the internal friction force of the machine part, and improve the puffing efficiency and the quality of the puffed material.

The invention relates to the technical field of intelligent detection, in particular to a workpiece feature recognition method and system for a CNC machining center. The method comprises the following steps: acquiring a point cloud picture of a workpiece; determining the outline of the workpiece based on the workpiece point cloud picture; calculating an edge angle according to the outline of the workpiece, and identifying a fillet area; detecting rough edge features of the fillet area, identifying cutting scratches, and determining the positions of the cutting scratches; residual burrs are recognized and machined based on the cutting scratch position, and the burr form is recorded; burr types are divided according to burr forms, and crack-shaped burr data and curled burr data are obtained; the groove wall sharpness is judged based on the crack-shaped burr data; the groove bottom protrusion degree is determined according to the curling burr data; evaluating the quality of the workpiece according to the sharpness of the groove wall and the protrusion degree of the groove bottom; defect features of the workpiece are identified based on workpiece quality. Precise recognition of the machining defects is achieved based on the intelligent detection technology, and therefore the quality evaluation and machining precision rate of the machined part is improved.

High speed, accurate, scalable, and dimension-insensitive additive manufacturing of a Three-Dimensional (3D) object may use incrementally solidifying light-sensitive resin layers. A new layer is formed by supplying the resin liquid via a cavity in the formed 3D object, and curing the supplied resin by a focused light beam, such as a laser beam. The added layers are formed by supplying, 2024 / 184876 using a pump, the light-cured resin fluid to one or more bottom openings to be output from the top opening (or to multiple openings) via a vertical cavity (or multiple cavities) of the 3D object. The curing is by focusing a light beam to the area of the resin output from the top opening, while keeping the top opening non-cured, so that resin can be passed via the cavity. Such 3D printing may be directly applied to any surface, such as a floor, wall, wing structure, or machined part.

The invention belongs to the technical field of intelligent manufacturing equipment, and particularly relates to a multifunctional intelligent multi-spindle numerical control lathe which comprises a lathe base, a first spindle, a second spindle, a machining mechanism and a feeding and discharging mechanism. The first main shaft and the second main shaft capable of being adjusted in the axial direction cooperatively clamp and drive a product to rotate, and the machining mechanism completes machining operation such as turning and boring. The feeding and discharging mechanism comprises a driving mechanism, a lifting piece, a force sensor, a sliding rod and a supporting piece, and the state change of the supporting piece is achieved through switching of different telescopic lengths of the driving mechanism. When the first telescopic length is reached, the supporting piece obliquely discharges chips; the to-be-machined part is stably supported and aligned with the main shaft at the second telescopic length; the third telescopic length facilitates feeding and discharging. The force sensor detects the weight of the product in the lifting process and records the machining loss and the qualification condition. The lathe achieves auxiliary feeding and discharging, scrap collection and weight detection, manpower consumption and operation difficulty are reduced, safety and machining efficiency are improved, and practicability is high.

The present invention relates to a manual high-pressure parts washer for safe and effective machine part washing while maintaining cleaning solution quality and protecting pump performance.The washer includes a main body (10) with internal space divided by partition (11) and vertical plate (12) into upper operation room (13), lower machine room (14), and water storage room (15). An opening (16) with door (20) is formed at the upper side. A cleaning solution spray pipe (30) is provided inside the main body (10). A glove-shaped sleeve (40) extends into the operation room (13) through fixing hole (22a) in door (20) for user hand insertion. Water supply unit (50) supplies cleaning solution from water storage room (15) to spray pipe (30).The operator arranges parts in operation room (13) and sprays cleaning solution for washing. This provides simple structure for easy parts cleaning.

The invention relates to the technical field of machining, in particular to a tool clamp and a using method. The device comprises a main body unit which comprises a seat body, a first table body arranged on the seat body, a second table body arranged on one side of the first table body, two telescopic assemblies symmetrically arranged at the two ends of the first table body and the two ends of the second table body, and an adjusting assembly arranged on one side of the second table body, and the limiting pieces are arranged on the two groups of telescopic assemblies. The clamp has the beneficial effects that by arranging the adjusting assembly and the self-locking component, a to-be-machined part can be more conveniently clamped in a rotating and pressing mode, the self-locking function is achieved, the clamp can be automatically fixed after clamping operation is completed, manual maintenance is not needed, and the operation process is greatly facilitated; through the design of the cleaning assembly, it is ensured that key parts of the clamp are not affected by impurities, and the reliability and stability of the clamp are improved.

The invention provides an active intelligent protection automatic numerical control lathe, and belongs to the technical field of automatic numerical control lathes. The automatic numerical control lathe comprises an automatic numerical control lathe body, and the intelligent protective door comprises a door body. A buffer structure is arranged on the door body; the buffering structure comprises a containing groove formed in one side of the door body, a sliding groove is formed in the door body through the containing groove, the door body is slidably connected with a sliding block through the sliding groove, a buffering plate is installed on one side of the sliding block, and the buffering plate is located in the containing groove. The door body is provided with a spring through the sliding groove. The buffer structure is arranged, the air pressure in the fixed cylinder is adjusted through the air pump, and after the buffer plate is stressed, the piston is driven by the compression spring and the movable rod to compress the air in the fixed cylinder, so that the buffer effect is achieved, and the effect that a high-speed machined part is directly stressed on the door body is avoided as much as possible; the damage of the machined part to the intelligent protective door is avoided as much as possible.

The utility model provides a part fixing device for engineering machinery machining, and belongs to the technical field of engineering machinery. The machining platform is fixed to the top of the base and used for placing parts for engineering machinery machining; two fixed seats are symmetrically arranged and are fixed at the bottom of the base; the rotating rod is rotationally arranged on the inner walls of the two fixed seats; the clamping and fixing mechanism is arranged on the base, is matched with the rotating rod for use, and is used for replacing and adjusting the clamping plate according to different shapes of engineering machinery processing parts; and the dismounting component is arranged on the base, is connected with the clamping and fixing mechanism and is used for conveniently replacing the abraded clamping plate. According to the clamping device, the clamping plates making contact with the parts for engineering machinery machining for a long time can be conveniently detached and replaced, the shapes of the clamping plates can be matched and replaced according to the parts for engineering machinery machining of different shapes and specifications, and the overall limitation of the device is effectively reduced.

The utility model discloses a general section bar hole site auxiliary processing device, which comprises a base plate, a positioning pressure plate and a pressure plate, the base plate is provided with a plurality of positioning holes and a plurality of threaded holes, the plurality of positioning holes are linearly distributed, the plurality of threaded holes are also linearly distributed, the straight lines formed by the plurality of positioning holes and the plurality of threaded holes are parallel to each other, positioning pins are inserted in the positioning holes, and the pressure plate is arranged on the base plate. The positioning pressing plate is positioned through the positioning pin, a to-be-machined part is clamped on the bottom plate, the bolt penetrates through the through hole in the pressing plate to be matched with the threaded hole in the bottom plate, and the to-be-machined part and the positioning pressing plate are fixed on the bottom plate; the device has the advantages that positioning and locking are achieved, high precision is guaranteed, and parts are effectively prevented from deviating in the machining process; the efficiency is improved through one-time installation, hole site machining can be completed only through one-time installation, repeated clamping of parts is avoided, installation errors caused by repeated clamping are reduced, meanwhile, the tool has universality, hole site machining can be carried out on the same profile only by replacing the positioning pressing plate, and the tool machining cost can be saved.

The utility model discloses a quick positioning tool for preventing radial deformation during machining of an axial thin-walled workpiece, which belongs to the technical field of machining of thin-walled workpieces and comprises a chuck body, a plurality of sliding chutes are uniformly distributed on the chuck body along the circumferential direction and are arranged along the radius direction of the chuck body, and clamping components for clamping workpieces are arranged in the sliding chutes. The clamping component comprises a positioning clamping jaw, a tool clamp and a connecting bolt, the tool clamp is connected with the positioning clamping jaw through the connecting bolt, and an adjusting component used for adjusting the positioning clamping jaw is arranged in the chuck body. According to the clamping tool, the thin-wall part can be rapidly positioned and clamped by combining the clamping component with the adjusting component, and the problems that an existing clamping tool for machining the axial thin-wall part is prone to causing non-uniform deformation of the part due to the stress relation, and the machined part cannot be rapidly positioned and clamped are effectively solved; the machining efficiency is low; and meanwhile, the percent of pass of machined parts is easily reduced.

This utility model discloses a center hole grinding machine, belonging to the field of material processing technology. It includes a slide rail body, a head ejector seat and a tail ejector seat oppositely disposed at both ends of the slide rail body and slidably connected to the slide rail body via a slider, a front processing ejector fixed inside the head ejector seat, a rear processing ejector located inside the tail ejector seat, and a chuck for clamping shaft-machined parts. The slider is equipped with a locking component. The tail ejector seat is equipped with an elastic pressing assembly that drives the rear processing ejector to move axially. A dial is rotatably connected to the outside of the front processing ejector via a bearing. A lever is fixed on the dial for driving the chuck to rotate coaxially. A continuously variable motor for driving the dial is installed on the head ejector seat. This utility model improves the grinding uniformity and processing accuracy of the two electrode machining holes, ensuring the coaxiality of the center hole after grinding.