Cutting and grinding integrated device for differential shell

Abstract

The invention relates to the technical field of differential shell machining equipment manufacturing, and particularly discloses a cutting and grinding integrated device for a differential shell, which comprises a base, and a machine table and a controller are mounted on the base; the cutting assembly comprises a transverse moving truss and a cutting piece, and the cutting piece can cut the blank piece; the grinding assembly comprises a mounting frame and a grinding piece, the grinding piece is arranged on the mounting frame, and the grinding piece can grind the cut notch of the differential shell; the fixing assembly comprises an inner fixing part, an outer fixing part and a first driving part, a fixing seat is rotationally arranged on the machine table and corresponds to the cutting part or the polishing part, the first driving part, the inner fixing part and the outer fixing part are all installed on the fixing seat, the first driving part is connected with the inner fixing part, and the inner fixing part is in transmission connection with the outer fixing part. The blank piece is fixed to the fixing base through the combined action of the inner fixing piece and the outer fixing piece. The method has the effect of improving the working efficiency and the product consistency.

Description

Technical Field

[0001] The present application relates to the technical field of differential case processing equipment manufacturing, and in particular to an integrated cutting and polishing device for a differential case. Background Art

[0002] As a key component in the automotive transmission system, the differential is responsible for balancing the speed difference between the left and right wheels. The differential housing, which serves as the carrier and packaging for the differential, is often mass-produced using a casting process. During the casting process, multiple protruding gates, remnants of the gating system, form on the surface of the differential housing. These gates must be trimmed and removed, and the surface polished to ensure dimensional accuracy, surface quality, and structural integrity. The automotive parts manufacturing industry currently places particular emphasis on post-forming processing of the differential housing, particularly trimming and polishing of the outer edges, open ends, and connection surfaces. This not only impacts product performance but also directly affects the reliability and service life of subsequent assembly.

[0003] During the differential case casting process, a single mold is often used to simultaneously cast a blank containing multiple differential cases. Gates and runners are located between the differential cases on the blank, and the junctions between the gates and runners are often curved. This necessitates multiple cuts and polishes to produce a single differential case. Currently, in actual production, the cutting and polishing of differential cases is typically performed in separate processes and equipment. A typical process involves first trimming the housing of any excess protruding gates using specialized cutting equipment (such as a saw, plasma cutter, or mechanical milling machine). The housing is then transferred to a separate polishing station, where it is polished and finished manually or semi-automatically to achieve the required dimensional accuracy and surface finish. For example, the Chinese patent with publication number CN113352169B in the relevant technology proposes an integrated device for automatic cutting and polishing of galvanized pipe fittings, which mainly solves the problems of low efficiency, uneven cuts and lack of stable support in manual polishing in the existing technology. The device includes a base plate, a support locking mechanism and a cut polishing mechanism. Through the placement table, the clamping unit and the internal support unit, multiple galvanized square pipes are synchronously fixed and internally supported to prevent deformation during polishing; the cut polishing mechanism adopts a screw-driven sliding seat with an adjustable height polishing table, which can complete efficient and uniform polishing of the cuts in batches, significantly improving the smoothness of the cuts and processing efficiency.

[0004] However, the cutting process often involves high-temperature, localized heating. If polishing is not done promptly, a "heat-affected zone" (HAZ) with increased hardness can easily form at the cut surface, leading to uneven stress release. Once the housing enters subsequent processing or actual use, it can easily deform due to concentrated internal stress, impacting the vehicle's operational stability. Furthermore, the entire workflow is fragmented and inefficient, and the switching between multiple processes can easily introduce positioning errors, limiting product consistency and precision, making it difficult to meet the higher quality control requirements of high-end manufacturing. Summary of the Invention

[0005] This application provides an integrated cutting and polishing device for differential cases. This device achieves integrated cutting and polishing of differential cases, and can automatically adjust the polishing position according to the cutting position during the process, ensuring accurate and effective polishing of the cut position, improving work efficiency and product consistency, reducing the degree of manual intervention, and enhancing the controllability of the process and the adaptability to high-end manufacturing.

[0006] The present application provides an integrated cutting and polishing device for a differential case, which adopts the following technical solutions: A cutting and grinding integrated device for a differential housing, comprising: A base, on which a machine platform is fixed, and a controller is provided on the machine platform; A cutting assembly, comprising a transverse truss and a cutting piece, wherein the transverse truss is fixed on the base, a cutting arm is slidably provided on the transverse truss, and the cutting piece is provided on the cutting arm, and the cutting piece can cut the blank; A grinding assembly, comprising a mounting frame and a grinding piece, wherein the mounting frame is fixedly mounted on one side of the machine, and the grinding piece is disposed on the mounting frame, and the grinding piece can perform grinding on the cutout of the differential housing; The fixing assembly comprises an inner fixing member, an outer fixing member and a first driving member, a fixing seat is rotatably provided on the machine platform, the fixing seat is located between the cutting member and the grinding member, and the fixing seat is selectively arranged corresponding to the cutting member and the grinding member, a positioning groove is provided on the fixing seat, the inner fixing member is arranged in the positioning groove, and the outer fixing member is arranged on the fixing seat, the first driving member is fixed on a surface of the fixing seat facing away from the outer fixing member, the output end of the first driving member is connected with the inner fixing member, the inner fixing member is transmission-connected with the outer fixing member, the inner fixing member abuts against the inner wall of the differential housing, the outer fixing member abuts against the outer wall of the differential housing, and the blank is fixed to the fixing seat by the joint action of the inner fixing member and the outer fixing member.

[0007] By adopting the above technical solution, the cutting component, grinding component and fixing component are integrated and set on the same machine platform and uniformly controlled by the controller, realizing the continuous and automated processing flow from cutting to grinding of the differential case blank, significantly optimizing the problems of low efficiency, large positioning error and high manual labor intensity caused by multi-equipment and multi-station segmented processing in the existing process. The fixing component is set between the cutting part and the grinding part so that grinding can be carried out immediately after cutting is completed, avoiding the problems of residual stress concentration and material hardening caused by the failure to grind the heat affected zone of the incision in time. , preventing the housing from being affected by deformation during subsequent use or processing, thereby affecting performance and assembly quality; through internal and external fixings, the inner and outer walls of the differential housing are synchronously positioned and clamped on both sides, effectively preventing the workpiece from displacement or vibration during processing, ensuring processing accuracy and operational stability; at the same time, this structure can adapt to the installation requirements of housings of different specifications, improve the system's versatility and clamping efficiency, realize the integrated processing of differential housing cutting and grinding, improve work efficiency and product consistency, reduce the degree of manual participation, and enhance the controllability of the process and the adaptability to high-end manufacturing.

[0008] Optionally, the internal fixing member includes an expansion tube and an extrusion plug, the expansion tube is coaxially arranged in the positioning groove, the expansion tube is configured to be conical, one end of the expansion tube is fixedly provided with a positioning portion, the positioning portion is fixedly connected to the fixing seat, the other end of the expansion tube is provided with multiple groups of deformation slots, the extrusion plug is slidably inserted in the expansion tube, the shape of the extrusion plug is adaptively arranged to the shape of the expansion tube, the output end of the first driving member is fixedly connected to one end of the extrusion plug, when the first driving member drives the extrusion plug to move in the expansion tube, the extrusion plug squeezes the end of the expansion tube with the deformation slot away from the end of the first driving member, thereby making the end of the expansion tube with the deformation slot press against the inner wall of the differential case.

[0009] By adopting the above technical solution, the internal fixing structure composed of the expansion tube and the extrusion plug, in conjunction with the driving action of the first driving member, enables the extrusion plug to be pushed axially to cause the end of the expansion tube to expand radially, thereby realizing automatic expansion-type positioning clamping of the inner wall of the differential housing. Compared with the traditional rigid claw or bolt fixing method, this structure has multiple sets of deformation slots on one end of the expansion tube, which can automatically compensate and fit differential housings of different inner diameters and shapes under driven extrusion, thereby improving the compatibility of clamping. In addition, the conical cylindrical structure, in conjunction with the axial advancement method, can form 360-degree uniform contact inside the housing, avoiding the concentration of clamping stress caused by point contact or line contact, thereby reducing the risk of clamping deformation. In addition, during the clamping process, there will be no positioning deviation due to friction displacement, thereby ensuring the accuracy of subsequent cutting and polishing processes, and ensuring the consistency and processing quality of the product.

[0010] Optionally, the external fixing member includes a transmission arm, a connecting rod and a pressing arm, one end of the transmission arm is fixedly connected to the end of the extrusion plug close to the first driving member, the other end of the transmission arm is rotatably connected to one end of the connecting rod, the pressing arm is rotatably arranged on a surface of the fixing seat close to the differential housing, the end of the connecting rod away from the transmission arm is rotatably connected to one end of the pressing arm, and the other end of the pressing arm abuts against the outer wall of the differential, when the first driving member drives the extrusion plug to make one end of the expansion tube abut against the inner wall of the differential housing, the transmission arm drives the pressing arm through the connecting rod to press the differential housing onto the fixing seat.

[0011] By adopting the above technical solution, the external fixing part constructs a mechanical transmission path that synchronously drives the external fixing part from the extrusion action of the internal fixing part through a multi-stage linkage mechanism between the transmission arm, the connecting rod and the pressing arm, thereby realizing the two-way clamping operation of the inner and outer walls of the differential housing while the first driving part only drives the extrusion plug. Compared with the existing clamping method that requires separate control of the inner and outer positioning structures, this structure only requires a single driving source to coordinate the clamping of the inner and outer walls, simplifying the structural design and control logic, and reducing the complexity and failure probability of the control system; in addition, the pressing arm is installed on the fixed seat by rotation, and can automatically adapt to the dimensional tolerance or local geometric changes of the differential housing in conjunction with the transmission structure to achieve flexible clamping, effectively avoiding the risk of over-positioning or crushing during the clamping process. This structure improves the stability and repeatability of the housing clamping process, and ensures the consistency of processing during subsequent cutting and polishing.

[0012] and a lever, having one end in pinned connection to the bottom of the drag pole, the middle portion being a pin of the first telescopic member and the other end being a pin of the first telescopic member.

[0013] By adopting the above technical solution, a gate support is added to the fixed component to construct a mechanism that can support and limit the gate and runner parts on the blank. In the traditional positioning method, the positioning of the differential housing only relies on the positioning and clamping of the blank body, and the gate and runner parts are often regarded as "non-functional areas" and are not constrained; however, in the actual cutting process, as the cutting piece separates the gate, the gate with a larger mass or asymmetric structure may collide with the surface or edge of the shell that has been cut due to gravity or instantaneous falling impact, thereby causing scratches, bumps or micro-deformations, which seriously affect the cutting process. The gate support structure, which affects the quality and pass rate of the final product, combined with the first telescopic member and the clamping arm limit mechanism, can not only realize dynamic support and clamping positioning of the runner of the blank, but also provide lateral constraint through the swing action of the clamping arm, effectively preventing the gate from accidentally falling or shifting during cutting, thereby protecting the cut shell from impact, and at the same time improving the stability and reliability of the cutting process, and improving the overall processing safety. It is especially suitable for differential housing casting blanks with long gates and obvious center of gravity offset, which significantly reduces the risk of rework and precision error in subsequent grinding and assembly processes.

[0014] Optionally, the pressing arm is provided with a detection member for detecting the cutting position, the detection member includes a base plate, a third telescopic member, a distance sensor and an extrusion tube, a deflection axis is fixedly provided at one end of the base plate, a rotating seat is fixedly provided at one side in the width direction of the pressing arm, the deflection axis is rotatably connected to the rotating seat, the base plate is rotatably arranged on the pressing arm through the deflection axis, the length direction of the base plate is arranged parallel to the width direction of the pressing arm, the third telescopic member is fixed on the pressing arm, and the output end of the third telescopic member is connected to the end of the base plate away from the deflection axis. The distance sensor is fixed on the base plate, the distance sensor is electrically connected to the controller, the extrusion tube is configured as a bellows with closed ends, hydraulic oil is filled in the extrusion tube, one end of the extrusion tube is fixed on the side of the pressing arm away from the base plate, the other end of the extrusion tube is movably abutted against the fixing seat, the extrusion tube is transmission-connected to the third telescopic member, when the pressing arm presses the differential housing onto the fixing seat, the extrusion tube is squeezed by the fixing seat, and the hydraulic oil in the extrusion tube causes the output end of the third telescopic member to retract inward into place.

[0015] By adopting the above technical solution, a detection part for detecting the cutting position is provided on the pressing arm, and the detection part is provided with an extrusion tube abutting the fixed seat and a distance sensor electrically connected to the controller. It can sense in real time whether the differential housing is completely flat in place when it is clamped, and complete automatic fine-tuning through extrusion feedback and the third telescopic part, thereby effectively improving the accuracy of the cutting and grinding positions. In particular, considering that due to various unstable factors such as cooling shrinkage, mold wear or uneven pouring during the casting process, the connection surface of the differential housing may be warped, convex or concave, etc., resulting in the connection surface being unable to achieve full contact and flatness when clamped on the fixed seat, thereby causing the installation posture of the entire blank to be skewed. Direct cutting in this skewed state will cause the working position of the tool to be offset, resulting in cutting path deviation, and thus affecting the surface quality and positioning consistency in the subsequent grinding process.

[0016] The cam is provided with a toothed belt and a guide wheel, and the guide wheel is provided with a toothed belt and a guide wheel is provided on the toothed belt.

[0017] By adopting the above technical solution, a tensionable grinding belt structure and an elastic support structure are set up to ensure that the grinding part is always in an appropriate tension state during operation, effectively avoiding slipping or uneven grinding force during the grinding process, thereby improving the grinding efficiency and surface treatment consistency, and ensuring the surface quality and precision requirements of the shell incision.

[0018] Optionally, the grinding assembly also includes a swinging member, which includes a rotating drive member, a turntable, a pulling arm and a swing arm, the rotating drive member is fixed on the grinding seat, the rotating drive member is electrically connected to the controller, the turntable is fixed on the output end of the rotating drive member, the grinding seat is fixed with an extension part on one side close to the fixed seat, the swing arm is rotatably arranged on the extension part, and the swing arm is respectively provided with a group of second pulleys at both ends in the length direction, the second pulley is movably pressed against the inner ring of the grinding belt, and a rotating shaft is fixed in the radial direction of the turntable, one end of the pulling arm is rotatably connected to the rotating shaft, and the other end of the pulling arm is rotatably connected to one end of the swing arm, and when the rotating drive member drives the turntable to rotate, the pulling arm can drive the swing arm to swing back and forth.

[0019] By adopting the above technical solution, a swinging part is set in the grinding assembly, and the linkage structure of the rotating drive part, turntable, pulling arm and swinging arm is used to realize the reciprocating swinging action of the grinding belt during the grinding process, which effectively simulates the manual swinging operation method in manual grinding. Compared with the traditional single-direction mechanical grinding, this structure enables the grinding belt to fit the workpiece surface at multiple angles and in multiple directions, which is particularly suitable for the complex curved surfaces, edges and irregular gate areas of the differential housing. This dynamic swinging behavior simulating manual grinding significantly improves the coverage and flexibility of grinding, and effectively avoids the problems of missed grinding, over-grinding or grinding dead corners in traditional fixed-track grinding; at the same time, it also enhances the adaptability of the equipment to different housing shapes and sizes, meets the requirements of personalized grinding paths, further improves the uniformity of grinding quality and surface finish, and reduces subsequent assembly interference or quality risks caused by insufficient local grinding.

[0020] Optionally, a slide rail is fixed on the mounting frame, the grinding seat is slidably set on the slide rail, a displacement driving member is provided on the mounting frame, the grinding seat is connected to the output end of the displacement driving member, and the displacement driving member is electrically connected to the controller.

[0021] By adopting the above technical solution, slide rails and displacement drive members are arranged on the mounting frame, so that the grinding seat has an adjustable sliding function, which not only improves the adjustability and spatial adaptability of the grinding assembly, but also can dynamically fine-tune the position according to the specifications and dimensions of different differential housings; further, the displacement drive member and the detection member form a feedback closed-loop linkage. When the detection member detects that the blank is not accurately positioned or is tilted or deviated, the controller can adjust the position of the grinding member by driving the displacement drive member, thereby ensuring that the grinding member is always accurately ground to the incision, which significantly improves the intelligence level of the system, can effectively avoid manual adjustment errors, ensure the stability and consistency of the grinding quality, and meet the needs of high-precision automated processing.

[0022] Optionally, a locating pin is fixedly provided on the fixing plate, and the locating pin can be plugged into and matched with a bolt connection hole on a connecting surface at one end of the differential housing, and the shaft diameter of the locating pin is smaller than the hole diameter of the threaded connection hole.

[0023] By adopting the above technical solution, arranging the locating pin to cooperate with the bolt hole on the shell connection surface can provide quick preliminary positioning during the clamping process, simplify the centering steps, effectively shorten the machine adjustment time, and improve operating efficiency.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The cutting component, grinding component and fixing component are integrated and set on the same machine platform and uniformly controlled by the controller, realizing the continuous and automated processing flow from cutting to grinding of the differential case blank, significantly optimizing the problems of low efficiency, large positioning error and high manual labor intensity caused by multi-equipment and multi-station segmented processing in the existing process. The fixing component is set between the cutting part and the grinding part so that grinding can be carried out immediately after the cutting is completed, avoiding the problems of residual stress concentration and material hardening caused by the failure to grind the heat affected zone of the incision in time, and solving the problem from the source. This prevents deformation of the housing during subsequent use or processing, which could affect performance and assembly quality. Internal and external fixtures achieve dual-sided synchronous positioning and clamping of the inner and outer walls of the differential housing, effectively preventing displacement or vibration of the workpiece during processing and ensuring processing accuracy and operational stability. Furthermore, this structure can adapt to the installation requirements of housings of different specifications, improving system versatility and clamping efficiency. It also achieves integrated processing for cutting and polishing the differential housing, improving work efficiency and product consistency, reducing manual involvement, and enhancing process controllability and high-end manufacturing adaptability. 2. A gate support member is added to the fixed assembly to create a mechanism that supports and limits the gate and runner sections of the blank. Combined with the first telescopic member and the clamp arm limiter mechanism, this not only provides dynamic support and clamping positioning for the runner section of the blank, but also provides lateral restraint through the swinging motion of the clamp arm, effectively preventing the gate from accidentally falling or shifting during cutting, thereby protecting the cut housing from impact. This also improves the stability and reliability of the cutting process and enhances overall processing safety. This is particularly suitable for differential housing castings with long gates and significant center of gravity offset, significantly reducing the risk of rework and precision errors in subsequent polishing and assembly processes. 3. A detection member for detecting the cutting position is installed on the pressing arm. It is equipped with an extrusion tube that abuts the fixed seat and a distance sensor electrically connected to the controller. It can sense whether the differential housing is completely flat in real time when it is clamped. It uses extrusion feedback and the third telescopic member to achieve automatic fine-tuning, effectively improving the accuracy of the cutting and grinding positions. 4. A swinging part is set in the grinding assembly, and the linkage structure of the rotating drive part, turntable, pulling arm and swinging arm is used to realize the reciprocating swinging motion of the grinding belt during the grinding process, which effectively simulates the manual swinging operation method in manual grinding. Compared with the traditional single-direction mechanical grinding, this structure enables the grinding belt to fit the workpiece surface at multiple angles and in multiple directions, which is especially suitable for the complex curved surfaces, edges and irregular gate areas of the differential housing. This dynamic swinging behavior simulating manual grinding significantly improves the coverage and flexibility of grinding, and effectively avoids the problems of missed grinding, over-grinding or grinding dead corners in traditional fixed-track grinding; at the same time, it also enhances the adaptability of the equipment to different housing shapes and sizes, meets the requirements of personalized grinding paths, further improves the uniformity of grinding quality and surface finish, and reduces subsequent assembly interference or quality risks caused by insufficient local grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the blank in the embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the overall structure of the integrated cutting and polishing device in an embodiment of the present application.

[0027] Figure 3 It is a structural schematic diagram of the integrated cutting and polishing device in an embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the overall structure of the fixing component and the polishing component in the embodiment of the present application.

[0029] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0030] Figure 6 It is a schematic diagram of the overall structure of the fixing component in the embodiment of the present application.

[0031] Figure 7 yes Figure 6 Enlarged schematic diagram of part C.

[0032] Figure 8 yes Figure 4 Enlarged schematic diagram of part A.

[0033] Reference numerals: 01, blank; 011, differential housing; 012, runner; 013, gate; 1. Base; 11. Machine; 111. Support frame; 12. Controller; 2. Cutting assembly; 21. Transverse truss; 22. Cutting piece; 23. Cutting arm; 3. Grinding assembly; 31. Mounting frame; 311. Slide rail; 32. Grinding member; 321. Grinding seat; 3211. Extension; 322. Grinding drive member; 323. Swing arm; 324. Elastic member; 325. Grinding belt; 326. First pulley; 327. Tensioning pulley; 33. Swing member; 331. Rotary drive member; 332. Turntable; 3321. Rotating shaft; 333. Pull arm; 334. Swing arm; 335. Second pulley; 34. Displacement drive member; 4. Fixing assembly; 41. Internal fixing member; 411. Expansion tube; 4111. Positioning part; 4112. Deformation gap; 412. Extrusion plug; 42. External fixing member; 421. Transmission arm; 422. Connecting rod; 423. Pressing arm; 4231. Rotating seat; 43. First driving member; 44. Fixed seat; 441. Positioning groove; 442. Positioning pin; 45. Gate support member; 451. Support; 452. First telescopic member; 453. Clamping arm; 4531. Limiting part; 454. Second telescopic member; 455. Supporting part; 46. Detection member; 461. Bottom plate; 4611. Deflection axis; 462. Third telescopic member; 463. Distance sensor; 464. Extrusion tube. DETAILED DESCRIPTION

[0034] First of all, it should be noted that Figure 1 The blank 01 in this application includes two sets of differential housings 011, runners 012 and gates 013. The two sets of differential housings 011 are connected together through the runners 012. The gate 013 is located in the middle of the runners 012. The two sets of differential housings 011 are symmetrically arranged with the gate 013 as the center.

[0035] The following is combined with Figure 2-8 This application is described in further detail.

[0036] An embodiment of the present application discloses an integrated cutting and polishing device for a differential housing.

[0037] Reference Figure 2 The integrated cutting and polishing device for a differential case includes a base 1, a fixing assembly 4, a cutting assembly 2, and a polishing assembly 3. A machine table 11 is mounted on the base 1. Both the fixing assembly 4 and the polishing assembly 3 are mounted on the machine table 11, with the polishing assembly 3 positioned above the fixing assembly 4. The cutting assembly 2 is mounted on the base 1 and positioned to one side of the machine table 11. The fixing assembly 4 secures the blank 01 to the machine table 11, ensuring stable cutting and polishing of the blank 01. The cutting assembly 2 cuts the blank 01, removing the gate 013 and runner 012 from the blank 01 to obtain a single differential case 011. The polishing assembly 3 adjusts the polishing position in real time based on the cutting position of the cutting assembly 2, ensuring precise polishing of the differential case 011.

[0038] Reference Figure 3 In this embodiment, the base 1 is configured as a rectangular plate, with a machine platform 11 fixedly mounted at the center of the base 1. A housing is fixedly mounted on the base 1, with an observation window and a loading port provided on the housing. The housing can fully enclose the fixing assembly 4, the cutting assembly 2, and the grinding assembly 3. A gripping mechanism for automatically placing and retrieving the blank 01 is also provided on the outside of the base 1. This gripping mechanism is not shown in the drawings of this embodiment.

[0039] Reference Figure 4 and Figure 5 In the embodiment of the present application, the fixing assembly 4 includes a fixing seat 44, an internal fixing member 41, an external fixing member 42, a first driving member 43, a gate support member 45 and a detection member 46. The fixing seat 44 is configured as a rectangular plate. A rotating portion is fixedly provided on one end of the fixing seat 44 along its own width direction, and a chamfer is provided on the other end of the fixing seat 44. A deflection seat is fixedly provided on the side of the machine table 11 away from the base 1, and the rotating portion is rotatably connected to the deflection seat. The fixing seat 44 is rotatably set on the machine table 11 through the rotating portion. A plurality of groups of positioning pins 442 are fixedly provided on the side of the fixing plate away from the machine table 11. The positioning pins 442 can be plugged into the bolt connection holes on the connecting surface of the differential case 011, and the shaft diameter of the positioning pins 442 is smaller than the aperture of the threaded connection hole.

[0040] An electric push rod is installed on the machine 11, and the electric push rod is electrically connected to the controller 12. One end of the electric push rod is rotatably connected to the machine 11, and the other end of the electric push rod is rotatably connected to one side of the fixed seat 44. There are two groups of electric push rods on a group of fixed seats 44, and the two groups of electric push rods are symmetrically arranged along the length direction of the fixed seat 44.

[0041] A positioning groove 441 is formed through the fixing seat 44, and the internal fixing member 41 is installed in the positioning groove 441. The internal fixing member 41 includes an expansion tube 411 and an extrusion plug 412. The expansion tube 411 is configured in a conical cylindrical shape and is made of hard rubber. This material not only satisfies the requirement of sufficient friction but also has a certain elasticity and material strength. A positioning portion 4111 is fixed at one end of the expansion tube 411, and multiple sets of deformation slits 4112 are formed at the other end of the expansion tube 411. The multiple sets of deformation slits 4112 are arranged circumferentially on the expansion tube 411. The expansion tube 411 is coaxially arranged in the positioning groove 441. The positioning portion 4111 is fixedly connected to the side of the fixing seat 44 close to the machine 11. One end of the extrusion plug 412 is slidably inserted into the expansion tube 411. The shape of the end of the extrusion plug 412 inserted into the expansion tube 411 is adapted to the shape of the expansion tube 411.

[0042] A mounting base is fixedly provided on the side of the fixing base 44 close to the machine 11, and the first driving member 43 is fixedly mounted on the fixing base 44 through the mounting base. The first driving member 43 is electrically connected to the controller 12. The first driving member 43 can be set as a cylinder, and the output end of the first driving member 43 is fixedly connected to the end of the extrusion plug 412 away from the expansion tube 411.

[0043] The external fixing member 42 includes a transmission arm 421, a connecting rod 422, and a pressing arm 423. One end of the transmission arm 421 is fixedly connected to the end of the extrusion plug 412 away from the expansion tube 411. The other end of the transmission arm 421 is rotatably connected to one end of the connecting rod 422. The pressing arm 423 is rotatably mounted on the side of the fixing base 44 near the differential housing 011. The end of the connecting rod 422 away from the transmission arm 421 is rotatably connected to one end of the pressing arm 423. The other end of the pressing arm 423 slides against the outer wall of the blank 01. Two sets of external fixing members 42 are provided on one set of fixing bases 44. The two sets of external fixing members 42 are arranged in a circle with the positioning groove 441 as the center.

[0044] Reference Figure 6 and Figure 7 In the embodiment of the present application, the gate support member 45 includes a support 451, a clamping arm 453, a first telescopic member 452 and a second telescopic member 454. The support 451 is configured to be cylindrical, one end of the support 451 is fixed on the machine 11, and a conical support portion 455 is fixed on the other end of the support 451. The support portion 455 can assist in supporting the gate 013 on the blank 01. The support portion 455 is slidably inserted into the end of the support 451 away from the machine 11, and a compression spring is arranged between the support portion 455 and the support 451. A support frame 111 is fixed on the machine 11, and a first telescopic member 452 is fixed on the support frame 111. The first telescopic member 452 is configured as a hydraulic telescopic rod. An abutment portion is fixed on the output end of the first telescopic member 452, and the abutment portion is movably abutted against the blank 01. The first telescopic member 452 is installed between the support 451 and the fixed seat 44, and a chamfered end of the first telescopic member 452 is provided close to the fixed seat 44.

[0045] A swing shaft is fixed on the clamping arm 453, and a deflection seat is fixed on the machine 11. The swing shaft is rotatably connected to the swing seat. The clamping arm 453 is rotatably set on the machine 11 through the swing shaft, and the clamping arm 453 is located on one side of the support 451. The second telescopic member 454 is fixed on the end of the support 451 away from the support part 455. The second telescopic member 454 is also configured as a hydraulic telescopic rod. The second telescopic member 454 and the first telescopic member 452 are connected to each other through a first connecting pipe. The output end of the second telescopic member 454 is connected to one end of the clamping arm 453, and a limiting portion 4531 is fixed on the other end of the clamping arm 453. The limiting portion 4531 is movably abutted against the position of the flow channel 012 on the blank 01 to limit the position, and the limiting portion 4531 is made of hard rubber.

[0046] In this embodiment, two sets of fixing bases 44 are provided, and the two sets of fixing bases 44 are symmetrically arranged around the support 451. Two sets of first telescopic members 452, second telescopic members 454, and clamping arms 453 are each provided, and are all symmetrically arranged around the support 451. The second telescopic members 454 and clamping arms 453 are located on the same side of the support 451, and the second telescopic members 454 and the first telescopic members 452 are arranged crosswise.

[0047] Reference Figure 5 、 Figure 6 and Figure 7 In the embodiment of the present application, the detection member 46 includes a base plate 461, a third telescopic member 462, a distance sensor 463 and an extrusion tube 464. The base plate 461 is fixed with a deflection shaft 4611 at one end in its length direction, and a rotating seat 4231 is fixed on the pressing arm 423. The deflection shaft 4611 is rotatably connected to the rotating seat 4231. One end of the base plate 461 is rotatably set on the pressing arm 423 through the deflection shaft 4611. The length direction of the base plate 461 is parallel to the width direction of the pressing arm 423.

[0048] The third telescopic member 462 is configured as a hydraulic telescopic rod, and the initial state of the third telescopic member 462 is a fully extended state. The third telescopic member 462 is fixed on the pressing arm 423. The output end of the third telescopic member 462 is rotatably connected to the end of the base plate 461 away from the deflection axis 4611. The distance sensor 463 is fixed on the base plate 461, and the distance sensor 463 is electrically connected to the controller 12.

[0049] The extrusion tube 464 is configured as a bellows with closed ends, and the extrusion tube 464 is filled with hydraulic oil. One end of the extrusion tube 464 is fixed on the side of the pressing arm 423 away from the bottom plate 461, and the other end of the extrusion tube 464 can be movably abutted against the fixing seat 44. The extrusion tube 464 and the third telescopic member 462 are connected to each other through the second connecting tube. When the extrusion tube 464 is completely squeezed, the hydraulic oil in the extrusion tube 464 will cause the output end of the third telescopic member 462 to shrink inward into place.

[0050] Specifically, since the blank 01 in the embodiment of the present application includes two differential housings 011, and each set of fixing plates is used to fix one differential housing 011, and the two sets of external fixing members 42 arranged thereon can further limit the differential housing 011, the distance sensor 463 set thereon can detect in real time the distance between the cutting position of the cutting component 2 and the differential housing 011.

[0051] It's worth noting that while the first telescopic member 452, the second telescopic member 454, and the third telescopic member 462 are all hydraulic telescopic rods, their sizes vary, with the specific sizes being adapted to their respective installation locations. Furthermore, one end of the hydraulic telescopic rod in this embodiment is a fixed end, filled with hydraulic oil and equipped with a return spring for restoring the telescopic state. The other end of the hydraulic telescopic rod is an output end, which serves as the telescopic end of the hydraulic telescopic rod.

[0052] In this embodiment, two groups of detection members 46 are provided. The two groups of detection members 46 are respectively installed on the two groups of fixing components 4. The two groups of detection members 46 are symmetrically arranged with the support 451 as the center.

[0053] More specifically, the fixing seat 44 is initially in a vertical state, that is, the fixing seat 44 is perpendicular to the machine platform 11. When fixing the blank 01, the fixing seat 44 is deflected toward the support 451 so that the fixing seat 44 and the machine platform 11 are parallel. The blank 01 is placed on the fixing seat 44, and the positioning pin 442 can be plugged into and matched with the bolt connection hole on the connecting surface of one end of the differential housing 011, thereby preliminarily positioning the blank 01 on the fixing seat 44. Then, the first driving member 43 drives the extrusion plug 412 to press one end of the expansion tube 411 against the inner wall of the differential housing 011. At the same time, the extrusion plug 412 drives the transmission arm 421 to move upward. The transmission arm 421 drives the pressing arm 423 to deflect through the connecting rod 422. One end of the pressing arm 423 presses the blank 01 onto the fixing seat 44. During this period, the extrusion tube 464 will be squeezed and deformed, and the hydraulic oil in the extrusion tube 464 will be squeezed into the third telescopic member 462. The output end of the third telescopic member 462 drives the bottom plate 461 to drop away from the end of the deflection axis 4611; the side of the blank 01 that abuts against the fixed seat 44 will squeeze the output end of the first telescopic member 452. The blank 01 will continue to squeeze the hydraulic oil in the first telescopic member 452 and squeeze it into the second telescopic member 454 until the fixed seat 44 is parallel to the machine table 11. state, thereby causing the output end of the second telescopic member 454 to extend outward and drive one end of the clamping arm 453 to swing to the side away from the support 451, and the clamping arm 453 is provided with an end of a limit portion 4531 to clamp the runner 012 position on the blank 01. When the casting size of the blank 01 is standard, when the fixed seat 44 is parallel to the machine table 11, the second telescopic member 454 just drives the clamping arm 453 to clamp the blank 01, and the third telescopic member 462 also just makes the bottom plate 461 parallel to the machine table 11.

[0054] However, considering that due to various unstable factors such as cooling shrinkage, mold wear or uneven casting during the casting process, the connection surface of the differential housing 011 may be irregularly deformed such as warping, bulging or depression, resulting in the connection surface being unable to achieve full contact and flatness when clamped on the fixing seat 44, thereby causing the installation posture of the entire blank 01 to be skewed. Direct cutting in this skewed state will cause the working position of the tool to be offset, resulting in cutting path deviation, and further affecting the surface quality and positioning consistency in the subsequent grinding process. The detection part 46 can timely identify when the housing fails to fit and position through structural feedback and distance monitoring, and correct the subsequent grinding position through the adjustment action of the third telescopic part 462, thereby minimizing the positioning deviation caused by the uneven blank surface, ensuring the high consistency of the cutting and grinding processes, and improving the reliability and intelligence level of the entire integrated device.

[0055] Reference Figure 2 and Figure 3 In the embodiment of the present application, the cutting assembly 2 includes a transverse truss 21, a cutting arm 23, and a cutting piece 22. The transverse truss 21 is fixed on one side of the base 1 in the width direction. A guide rail is fixed on the transverse truss 21. A sliding seat is fixed at one end of the cutting arm 23. The sliding seat is slidably mounted on the guide rail. The cutting arm 23 is slidably mounted on the transverse truss 21 via the sliding seat. A rack is also fixed on the transverse truss 21. A drive motor is fixed on the sliding seat. The drive motor is electrically connected to the controller 12. A gear is fixed on the output end of the drive motor. The gear and the rack engage to achieve reciprocating sliding of the sliding seat on the transverse truss 21. At the same time, two sets of position sensors are also installed on the transverse truss 21. The two sets of position sensors correspond to two cutting positions on the blank 01. The cutting piece 22 includes a cutting motor and a circular saw blade. The cutting motor is fixed at the end of the cutting arm 23 away from the sliding seat, and the circular saw blade is fixed at the output end of the cutting motor.

[0056] Reference Figure 8In the embodiment of the present application, the grinding assembly 3 includes a mounting frame 31, a grinding piece 32 and a swinging piece 33. The mounting frame 31 is fixed on the machine 11. The mounting frame 31 is located on the side of the fixed seat 44 away from the support 451. The grinding piece 32 includes a grinding seat 321, a grinding drive member 322, a swing arm 323, an elastic member 324 and a grinding belt 325. A slide rail 311 is fixed on the mounting frame 31. The grinding seat 321 is slidably set on the slide rail 311. The grinding seat 321 is set above the fixed seat 44. Two sets of first pulleys 326 are rotatably set on the grinding seat 321. The two sets of first pulleys 326 are symmetrically arranged along the width direction of the grinding seat 321. The grinding drive member 322 is set The servo motor and the grinding drive member 322 are electrically connected to the controller 12. The grinding drive member 322 is fixed on the grinding seat 321. The output end of the grinding drive member 322 is fixedly connected to a group of first pulleys 326. One end of the swing arm 323 is rotatably set on the grinding seat 321. The other end of the swing arm 323 is rotatably set with a tensioning pulley 327. The elastic member 324 is installed between the swing arm 323 and the grinding seat 321. The elastic member 324 is set as a spring buffer rod. One end of the elastic member 324 is rotatably connected to the grinding seat 321. The other end of the elastic member 324 is rotatably connected to one end of the swing arm 323 provided with a tensioning pulley 327. The grinding belt 325 is simultaneously wound around the first pulley 326 and the tensioning pulley 327.

[0057] A displacement driver 34 is mounted on the grinding seat 321 and the mounting frame 31. In this embodiment, the position driver is configured as a linear motor. The grinding seat 321 is connected to the output end of the displacement driver 34, which is electrically connected to the controller 12. When the controller 12 obtains the real-time cutting position data of the cutting element 22 detected by the distance sensor 463, the controller 12 controls the displacement driver 34 to drive the grinding seat 321 to slide on the mounting frame 31, thereby adjusting the distance between the grinding seat 321 and the differential housing 011.

[0058] The swinging member 33 includes a rotating driving member 331, a turntable 332, a pulling arm 333 and a swinging arm 334. The rotating driving member 331 is also configured as a servo motor. The rotating driving member 331 is electrically connected to the controller 12. The rotating driving member 331 is fixed on the grinding seat 321. The turntable 332 is fixed on the output end of the rotating driving member 331. An extension portion 3211 is fixed on the side of the grinding seat 321 close to the fixed seat 44. A position sensor is fixed on the end of the extension portion 3211 away from the grinding seat 321. The position sensor is electrically connected to the controller 12. The position sensor can sense the differential housing 011 fixed on the fixed seat 44 to determine whether the grinding is completed.

[0059] The swing arm 334 is rotatably arranged on the extension part 3211, and a group of second pulleys 335 are respectively provided at both ends of the length direction of the swing arm 334. The second pulley 335 is movably pressed against the inner ring of the grinding belt 325. A rotating shaft 3321 is fixed in the radial direction of the turntable 332. One end of the pulling arm 333 is rotatably connected to the rotating shaft 3321, and the other end of the pulling arm 333 is rotatably connected to one end of the swing arm 334. When the rotating driving member 331 drives the turntable 332 to rotate, the pulling arm 333 can drive the swing arm 334 to swing back and forth.

[0060] The implementation principle of the integrated cutting and grinding device for the differential case of the present application is as follows: first, the gripping mechanism places the blank 01 to be cut on the fixing seat 44, during which the electric push rod deflects the fixing seat 44 to a certain angle close to the support 451, and then as the gripping mechanism places the blank 01 on the fixing seat 44, the blank 01 gradually presses the output end of the first telescopic member 452 downward, so that the second telescopic member 454 drives the clamping arm 453 to clamp the limited blank 01; at the same time, as the fixing seat 44 gradually deflects toward the support 451 until it is parallel, the positioning pin 442 provided on the fixing seat 44 is plugged into the bolt connection hole, the first driving member 43 drives the plug to press the expansion tube 411 against the inner wall of the differential case 011, and the pressing arm 423 presses the blank 01 on the fixing seat 44; Then the controller 12 controls the cutting piece 22 to move to the cutting position to cut the blank 01 in steps. The differential housing 011 that is cut first is deflected ninety degrees to the side away from the support 451 as the fixing seat 44 is acted upon by the electric push rod. The displacement drive 34 drives the grinding seat 321 to move downward, and the grinding belt 325 grinds the incision position. After the grinding is completed, the grasping mechanism will grasp the processed differential housing 011. At the same time, the first driving member 43 releases the limiting fixation of the inner fixing member 41 and the outer fixing member 42 on it, and the grasping mechanism takes away the differential housing 011.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cutting and grinding integrated device for a differential case, characterized in that: include: A base, on which a machine platform is fixed, and a controller is provided on the machine platform; A cutting assembly, comprising a transverse truss and a cutting piece, wherein the transverse truss is fixed on the base, a cutting arm is slidably provided on the transverse truss, and the cutting piece is provided on the cutting arm, and the cutting piece can cut the blank; A grinding assembly, comprising a mounting frame and a grinding piece, wherein the mounting frame is fixedly mounted on one side of the machine, and the grinding piece is disposed on the mounting frame, and the grinding piece can perform grinding on the cutout of the differential housing; The fixing assembly comprises an inner fixing member, an outer fixing member and a first driving member, a fixing seat is rotatably provided on the machine platform, the fixing seat is located between the cutting member and the grinding member, and the fixing seat is selectively arranged corresponding to the cutting member and the grinding member, a positioning groove is provided on the fixing seat, the inner fixing member is arranged in the positioning groove, and the outer fixing member is arranged on the fixing seat, the first driving member is fixed on a surface of the fixing seat facing away from the outer fixing member, the output end of the first driving member is connected with the inner fixing member, the inner fixing member is transmission-connected with the outer fixing member, the inner fixing member abuts against the inner wall of the differential housing, the outer fixing member abuts against the outer wall of the differential housing, and the blank is fixed to the fixing seat by the joint action of the inner fixing member and the outer fixing member.

2. The integrated cutting and polishing device for a differential case according to claim 1, characterized in that: The internal fixing member includes an expansion tube and an extrusion plug, the expansion tube is coaxially arranged in the positioning groove, the expansion tube is configured as a cone, one end of the expansion tube is fixedly provided with a positioning portion, the positioning portion is fixedly connected to the fixing seat, the other end of the expansion tube is provided with multiple groups of deformation slots, the extrusion plug is slidably inserted in the expansion tube, the shape of the extrusion plug is adapted to the shape of the expansion tube, the output end of the first driving member is fixedly connected to one end of the extrusion plug, when the first driving member drives the extrusion plug to move in the expansion tube, the extrusion plug moves away from the end of the first driving member to squeeze the end of the expansion tube with the deformation slot, so that the end of the expansion tube with the deformation slot is pressed against the inner wall of the differential case.

3. The integrated cutting and polishing device for a differential case according to claim 2, characterized in that: The external fixing member includes a transmission arm, a connecting rod and a pressing arm, one end of the transmission arm is fixedly connected to the end of the extrusion plug close to the first driving member, the other end of the transmission arm is rotatably connected to one end of the connecting rod, the pressing arm is rotatably arranged on a surface of the fixing seat close to the differential housing, the end of the connecting rod away from the transmission arm is rotatably connected to one end of the pressing arm, the other end of the pressing arm abuts against the outer wall of the differential, when the first driving member drives the extrusion plug to make one end of the expansion tube abut against the inner wall of the differential housing, the transmission arm drives the pressing arm through the connecting rod to press the differential housing onto the fixing seat.

4. The integrated cutting and polishing device for a differential case according to claim 1, characterized in that: The fixing assembly also includes a gate support member, and the gate support member includes a support, a first telescopic member and a clamping arm, the support is fixedly mounted on the machine platform, a support frame is fixedly provided on the machine platform, the support frame is located between the support and the fixed seat, the first telescopic member is fixedly mounted on the support frame, the output end of the first telescopic member is movably abutted against the blank, the clamping arm is rotatably arranged on the machine platform, the clamping arm is located on one side of the support, a second telescopic member is provided on the support, the second telescopic member is transmission-connected with the first telescopic member, the output end of the second telescopic member is connected to one end of the clamping arm, and a limiting part is fixedly provided at the other end of the clamping arm, and the limiting part is movably abutted against the runner on the blank for limiting positioning; when the blank is fixed on the machine platform by the fixing assembly, the blank squeezes the output end of the first telescopic member, so that the output end of the second telescopic member drives one end of the clamping arm to swing.

5. The integrated cutting and polishing device for a differential case according to claim 3, characterized in that: The pressing arm is provided with a detection member for detecting the cutting position, and the detection member includes a base plate, a third telescopic member, a distance sensor and an extrusion tube. A deflection shaft is fixedly provided at one end of the base plate, and a rotating seat is fixedly provided on one side in the width direction of the pressing arm. The deflection shaft is rotatably connected to the rotating seat, and the base plate is rotatably arranged on the pressing arm through the deflection shaft. The length direction of the base plate is parallel to the width direction of the pressing arm. The third telescopic member is fixed on the pressing arm, and the output end of the third telescopic member is connected to the end of the base plate away from the deflection shaft. The distance sensor is fixed on the base plate, and the distance sensor is electrically connected to the controller. The extrusion tube is configured as a bellows with closed ends. Hydraulic oil is filled in the extrusion tube. One end of the extrusion tube is fixed on the side of the pressing arm away from the base plate, and the other end of the extrusion tube is movably abutted against the fixing seat. The extrusion tube is transmission-connected to the third telescopic member. When the pressing arm presses the differential housing onto the fixing seat, the extrusion tube is squeezed by the fixing seat, and the hydraulic oil in the extrusion tube causes the output end of the third telescopic member to shrink inward into place.

6. The integrated cutting and polishing device for a differential case according to claim 1, characterized in that: The cam is provided with a toothed belt and a guide wheel, and the guide wheel is provided with a toothed belt and a guide wheel is provided on the toothed belt.

7. The integrated cutting and polishing device for a differential case according to claim 6, characterized in that: The grinding assembly also includes a swinging member, which includes a rotating drive member, a turntable, a pulling arm and a swing arm, the rotating drive member is fixed on the grinding seat, the rotating drive member is electrically connected to the controller, the turntable is fixed on the output end of the rotating drive member, the grinding seat is fixed with an extension portion on one side close to the fixed seat, the swing arm is rotatably arranged on the extension portion, and the swing arm is respectively provided with a group of second pulleys at both ends in the length direction, the second pulley is movably pressed against the inner ring of the grinding belt, and a rotating shaft is fixed in the radial direction of the turntable, one end of the pulling arm is rotatably connected to the rotating shaft, and the other end of the pulling arm is rotatably connected to one end of the swing arm. When the rotating drive member drives the turntable to rotate, the pulling arm can drive the swing arm to swing back and forth.

8. The integrated cutting and polishing device for a differential case according to claim 7, characterized in that: The mounting frame is fixed with a slide rail, the grinding seat is slidably arranged on the slide rail, the mounting frame is provided with a displacement driving member, the grinding seat is connected to the output end of the displacement driving member, and the displacement driving member is electrically connected to the controller.

9. The integrated cutting and polishing device for a differential case according to claim 1, characterized in that: A positioning pin is fixed on the fixing plate, and the positioning pin can be plugged into and matched with a bolt connection hole on a connection surface at one end of the differential housing. The shaft diameter of the positioning pin is smaller than the hole diameter of the threaded connection hole.

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