Auxiliary assembly equipment for slice-type inner mold used in screw drill stator forming processing

Abstract

The present invention belongs to the technical field of oil drilling equipment, and solves the technical problem of fast processing of screw drill stators. The present invention relates to an auxiliary assembly device for a slice-type inner mold core used for forming and processing the stator of a screw drill, comprising a bed, a lifting platform mechanism, an inner mold support platform, a two-way clamping mechanism, a trustee clamping mechanism, a workpiece clamping mechanism, a support slide, a slide drive mechanism and an auxiliary support mechanism; the support slide is movably mounted at the front of the upper end of the bed; the workpiece clamping mechanism is mounted at the upper end of the support slide; the auxiliary support mechanism is mounted in the middle of the bed; the lifting platform mechanism is mounted at the rear of the upper end of the bed; the inner mold support platform is fixedly mounted at the upper end of the lifting platform mechanism, and its upper part has a positioning groove extending in the front-to-back direction; a plurality of slots are arranged at the front and back of the positioning groove, and each slot position corresponds to a set of trustee clamping mechanisms; the two-way clamping mechanism is mounted at the upper end of the inner mold support platform. The present invention can realize the assembly and installation of the slice-type inner mold core and the assembly of the inner mold core and the tube blank.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling equipment, relates to a processing technology of a screw drill stator, and particularly relates to auxiliary assembly equipment of a slice-type inner mold for forming the screw drill stator. Background Art

[0002] Screw drill bits are essential equipment in the oil drilling field and primarily consist of two parts: a stator and a rotor. The stator of a screw drill bit is a tubular structure with a spiral shape inside and a correspondingly thick spiral shape outside. This type of tubular structure is currently primarily formed through milling and electrolysis. Current processing methods can only shape the stator to the desired shape, but cannot guarantee accuracy, resulting in a loss of the sealed cavity formed by the stator and rotor. Therefore, existing stator forming equipment cannot meet the requirements for stator shaping and also suffers from low processing efficiency.

[0003] In response to the shortcomings of existing processing methods, a method for continuous twisting of pipes was pre-designed, in which the pipe blanks were formed into petal-shaped thick-walled pipes. The key points of this pre-designed processing method are: when twisting the pipe, an inner mold core needs to be set inside the pipe to shape the pipe. In addition, since the pre-designed twisting is continuous, the inner mold core cannot adopt an integral structure. Finally, the inner mold core was designed as a skin-cutting inner mold. Multiple inner mold pieces are connected together through a central axis, which can realize the shaping of the pipe through a split and combined inner mold. In addition, as the pipe is twisted, the inner mold pieces at the corresponding positions can rotate synchronously with the twisting part.

[0004] The design of a sliced-skin assembly inner mold core meets the requirements for forming screw drill stators. However, before processing, dozens of sliced-skin inner mold slices must be threaded and fixed to a central shaft. The assembled structure must then be pushed into the tube blank to be processed. The tube blanks are over 25 cm in diameter and between 4 and 5 meters in length, which places heavy loads and large dimensions on the surface. This makes manual labor difficult. Therefore, a device is needed to assist in threading and assembling the sliced-skin inner molds and then inserting the assembled sliced-skin inner molds into the tube blank. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an auxiliary assembly device for a slice-type inner mold used for forming a screw drill stator.

[0006] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0007] An auxiliary assembly device for a slice-type inner mold used for forming a screw drill stator, comprising a bed, a lifting platform mechanism, an inner mold support platform, a two-way clamping mechanism, a tube clamping mechanism, a workpiece clamping mechanism, a supporting slide, a slide drive mechanism, and an auxiliary support mechanism;

[0008] The support slide is movably mounted on the front part of the upper end of the bed in the front-to-back direction and is connected to the slide drive mechanism; the workpiece clamping mechanism is used to clamp the front end of the workpiece to be inserted; the workpiece clamping mechanism is mounted on the upper end of the support slide; the auxiliary support mechanism is mounted in the middle position of the bed, and the auxiliary support mechanism is an elastic support mechanism that can be adjusted up and down, and is used to support the rear part of the workpiece to be inserted;

[0009] The lifting platform mechanism is installed at the rear part of the upper end of the bed; the inner mold support platform is fixedly installed at the upper end of the lifting platform mechanism, and the upper part of the inner mold support platform has a positioning groove extending in the front-to-back direction, and the shape of the positioning groove matches the shape of the slice-type inner mold core; a plurality of slots are evenly distributed at the positioning groove along the front-to-back direction according to the set intervals, and each slot position corresponds to a set of hosting clamping mechanisms;

[0010] The bidirectional clamping mechanism is installed on the upper end of the inner mold support platform; it includes front and rear groups of clamping actuators and a clamping drive mechanism; the front and rear groups of clamping actuators are movably installed above the inner mold support platform along the front and rear directions, respectively, and are used to limit the front and rear ends of the inner mold core composed of multiple inner mold pieces; the clamping drive mechanism is driven and connected to the front and rear groups of clamping actuators.

[0011] Moreover, a slide is provided at the front of the upper end of the bed, and a slide groove of matching shape is provided at the lower end of the supporting slide. The supporting slide forms a linear sliding fit with the slide along the front-rear direction of the bed through the slide groove.

[0012] The slide drive mechanism is located on one side of the support slide and utilizes a screw-nut transmission mechanism driven by a servo motor. A threaded hole extending in the front-to-rear direction is provided on one side of the support slide, with the screw threadedly mating with the threaded hole. The servo motor is fixed to the corresponding side of the bed, connected to one end of the screw via a coupling, and the screw is supported on support brackets at both ends. The support brackets at both ends are fixed to the sides of the bed.

[0013] Moreover, the workpiece clamping mechanism includes an arched bracket and three groups of clamping assemblies; an outer edge is provided at the lower part of the arched bracket, which is fixedly connected to the upper end of the supporting slide by screws; the three groups of clamping assemblies are composed of two groups relatively installed on both sides of the arched bracket and one group installed on the top of the arched bracket; each group of clamping assemblies includes a clamping block and a clamping block driving cylinder, the clamping block is provided inside the arched bracket, the clamping block driving cylinder is installed outside the arched bracket, and the cylinder rod of the clamping block driving cylinder passes through a through hole provided on the wall of the arched bracket and is fixedly connected to the outer end of the clamping block.

[0014] Moreover, the auxiliary support mechanism includes two elastic support legs that can move up and down and a roller assembly installed at the upper ends of the two elastic support legs; the elastic support legs are composed of a piston cylinder, a piston rod, an upper end cover and a spring; the piston cylinder is fixed to the bed, and a piston head is provided at the lower end of the piston rod, which is inserted into the inner cavity of the piston cylinder in a movable manner up and down, and the spring is installed between the lower end of the piston head and the inner bottom of the piston cylinder; the upper end cover is fixed to the upper end of the piston cylinder by screws; a square groove is provided at the upper end of the piston rod; the roller assembly is composed of a roller and a roller shaft, and the roller is rotatably supported on the roller shaft by a bearing, and left and right V-shaped support surfaces are provided on the roller; square shaft ends are used at both ends of the roller shaft, and the square shaft ends at both ends are embedded and supported in the square grooves at the upper ends of the two piston rods.

[0015] Moreover, the lifting platform mechanism includes a bottom plate, a top plate and a lifting drive mechanism arranged between the bottom plate and the top plate.

[0016] Moreover, at least two follow-up auxiliary support mechanisms are provided between the bottom plate and the top; the follow-up auxiliary support mechanism mainly includes two support arms, two rod sleeves, two springs, two spring pressure covers, and a compression spring installation box; the compression spring installation box is composed of a box bottom and a box cover that are fastened together and connected by screws, and a spring installation cavity is formed inside. The bottom of the box is fixedly connected to the bottom plate of the lifting platform mechanism, and inwardly extending guide spring columns are provided on the front and rear side walls inside the bottom of the box, and a long slot is provided in the middle position of the top of the box cover; the two springs are respectively mounted on the two guide spring columns, and the outer ends of the two springs are respectively pressed into contact with the inner walls of the spring mounting cavity on the corresponding sides, and the inner ends of the two springs are respectively press-fitted with a spring pressure cover; the two spring pressure covers are integrally provided with upward-cut outriggers away from the corresponding springs, and the two outriggers extend from the long slot on the box cover, and the ends of the two outriggers are respectively hinged to the lower end of a support arm, and the two supports are staggered. The upper ends of the two support arms are respectively hinged to the lower outriggers of the two rod sleeves, and the two rod sleeves can slide linearly and are mounted on the corresponding driving rods.

[0017] Moreover, the hosting clamping mechanism includes a hydraulic cylinder, a support cover, two first connecting arms, two second connecting arms, two clamping arms, and a support block; the hydraulic cylinder is vertically arranged, and its lower end is fixed on the top of the lifting platform mechanism; the support cover is fixed to the upper end of the cylinder barrel of the hydraulic cylinder, and a center hole for the cylinder rod of the hydraulic cylinder to extend is provided on the support cover; the two first connecting arms are symmetrically arranged on the left and right, and the lower ends of the two first connecting arms are hingedly connected to the two hinge seats arranged on the top of the support cover through a hinge shaft; the support block is fixedly installed on the cylinder rod end of the hydraulic cylinder, and the upper end of the support block is provided with an arc surface matching the outer contour surface shape of the slice-type inner mold core, and the support block is provided with hinge seats on the left and right sides of the arc surface, and is hingedly connected to one end of the two second connecting arms through the hinge shaft, and the other ends of the two second connecting arms are respectively hingedly connected to the middle of the two first connecting arms; the other ends of the two first connecting arms are fixedly connected to the lower ends of the two clamping arms; the two clamping arms are symmetrically arranged. The inner sides of the upper parts of the two clamping arms are provided with arc-shaped clamping action surfaces which are arc-shaped surfaces matching the outer contour surface shape of the sliced ​​inner mold core.

[0018] Moreover, the front and rear groups of clamping actuators both include a gantry, two hydraulic cylinders, and two stop arms; the two hydraulic cylinders are vertically fixed on the top of the gantry at positions corresponding to the two vertical sides, and the lower cylinder rod ends of the two hydraulic cylinders are fixedly connected to the two stop arms, and the two stop arms extend horizontally into the interior of the gantry through the long guide grooves on the vertical sides of the gantry; a guide groove is provided on each side of the lower end of the gantry; the two groups of clamping actuators are slidably matched with the two guide rails on the inner mold support platform along the front-to-back direction through the two guide grooves at the lower end of the gantry, and the two groups of clamping actuators are arranged in parallel front to back.

[0019] Moreover, the clamping drive mechanism adopts a screw-nut transmission mechanism driven by a motor, including forward and reverse screws, two optical bars, and a clamping servo motor; the clamping servo motor is fixedly installed on the inner mold support platform near the rear end, and the clamping servo motor is driven and connected to the rear end of the forward and reverse screws. The forward and reverse screws are threadedly connected with the threaded holes set on one side of the two door-shaped brackets through forward threads and reverse threads respectively; the two optical bars are respectively installed above the platform surface at the upper end of the inner mold support platform, forming a guiding match with the two door-shaped frames.

[0020] The advantages and positive effects of the present invention are:

[0021] 1. The present invention can support and position multiple inner mold pieces through the inner mold support platform, and realize the alignment and assembly of multiple inner mold pieces along the axial direction.

[0022] 2. The present invention can clamp and fix all inner mold pieces positioned on the inner mold support platform from both ends through a bidirectional clamping mechanism, thereby ensuring smooth insertion of the center axis.

[0023] 3. The present invention can clamp and fix the front end of the workpiece to be pushed (the first stage is the center axis, and the second stage is the tube blank) through the support slide and the workpiece clamping mechanism installed on the support slide. Cooperating with the auxiliary support mechanism at the rear, it ensures that the workpiece to be pushed is aligned with the center of the slice-type inner mold core at the rear, and the support slide is pushed backward by the slide drive mechanism, so that the workpiece can be pushed to a position that cooperates with the slice-type inner mold core.

[0024] 4. The present invention uses a hosting clamping mechanism and a lifting platform mechanism to support the slice-type inner mold before pushing the tube blank. The hosting clamping mechanism is arranged at intervals, and the platform mechanism is lowered to make the inner mold support platform and the slice-type inner mold core come into contact for threshing, thereby leaving space for pushing the tube blank.

[0025] In summary, through the cooperation of several mechanisms, the inner mold piece is assembled through the shaft and the assembly with the tube blank after the shaft is passed through is realized, which has the advantages of convenient operation and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the present invention;

[0027] Figure 2 is a perspective view of the present invention;

[0028] Figure 3 This is a reference diagram of the first stage of the first process of the present invention (installation of the sliced ​​inner die and the central axis);

[0029] Figure 4 This is a reference diagram of the second stage of the first process of the present invention (pushing the central axis process);

[0030] Figure 5 This is a reference diagram of the third stage of the first process of the present invention (the central axis is pushed into place);

[0031] Figure 6 This is a reference diagram of the first stage of the second process of the present invention (installing the tube blank);

[0032] Figure 7 This is a reference diagram of the second stage of the second process of the present invention (the bidirectional clamping mechanism is removed and the tube blank is clamped by the hosting clamping mechanism);

[0033] Figure 8 It is a reference diagram of the third stage of the second process of the present invention (tube pushing process);

[0034] Figure 9 It is a reference diagram of the fourth stage of the second process of the present invention (the end position of the push tube);

[0035] Figure 10This is a reference diagram of the fifth stage of the second process of the present invention (the rear door frame of the two-way clamping mechanism moves to a position in contact with the rear end of the skin-cutting inner mold core)

[0036] Figure 11 This is a reference diagram of the sixth stage of the second process of the present invention (the skin-cutting inner mold core is completely pushed into the tube blank)

[0037] Figure 12 It is a schematic diagram of the joint of the workpiece clamping mechanism of the present invention;

[0038] Figure 13 It is a structural schematic diagram of the auxiliary support mechanism of the present invention;

[0039] Figure 14 is a cross-sectional view of the elastic legs in the auxiliary support mechanism of the present invention;

[0040] Figure 15 It is a structural schematic diagram of the clamping execution part on one side of the bidirectional clamping mechanism of the present invention;

[0041] Figure 16 It is a structural schematic diagram of the inner mold support platform of the present invention;

[0042] Figure 17 is a schematic diagram of the hosting clamping mechanism of the present invention in an expanded state;

[0043] Figure 18 This is a schematic diagram of the hosting clamping mechanism of the present invention clamping a tube blank;

[0044] Figure 19 It is a front view of the lifting platform mechanism of the present invention;

[0045] Figure 20 It is a three-dimensional diagram of the lifting platform mechanism of the present invention;

[0046] Figure 21 It is a three-dimensional diagram of the elastic support mechanism in the lifting platform mechanism of the present invention;

[0047] Figure 22 It is a cross-sectional view of the elastic support mechanism in the lifting platform mechanism of the present invention. DETAILED DESCRIPTION

[0048] The structure of the present invention will be further described below with reference to the accompanying drawings and through examples. It should be noted that the present examples are descriptive rather than restrictive.

[0049] A kind of auxiliary assembly equipment for the sliced ​​inner mold used in the forming process of the screw drill stator, see Figure 1-Figure 22The invention point is: it includes a bed 1, a supporting slide 3, a slide driving mechanism 4, a workpiece clamping mechanism 2, an auxiliary supporting mechanism 5, a lifting platform mechanism 9, an inner mold supporting platform 7, a bidirectional clamping mechanism 6, and a trustee clamping mechanism 8.

[0050] A slide 1.1 is provided at the front of the upper end of the bed, and a shape-matching slide is provided at the lower end of the support slide. The support slide forms a linear sliding fit with the slide along the front-to-back direction of the bed through the slide. The slide drive mechanism is provided on one side of the support slide and adopts a screw-nut transmission mechanism driven by a servo motor 4.1. Specifically, a threaded hole along the front-to-back direction is provided on one side of the support slide, and the screw 4.2 forms a threaded fit with the threaded hole. The servo motor is fixed to the corresponding side of the bed, and the servo motor is connected to one end of the screw through a coupling. The screw is supported on support frames located at both ends. The support frames at both ends are fixed to the side of the bed.

[0051] The workpiece clamping mechanism is installed on the upper end of the support slide, and includes an arch bracket 2.1 and three groups of clamping assemblies. An outer edge 2.1.1 is provided at the lower part of the arch bracket, which is fixedly connected to the upper end of the support slide by screws. The three groups of clamping assemblies are composed of two groups relatively installed on both sides of the arch bracket and one group installed on the top of the arch bracket. Each group of clamping assemblies includes a clamping block 2.3 and a clamping block driving cylinder 2.2 (an oil cylinder or an air cylinder can be used), the clamping block is provided inside the arch bracket, the clamping block driving cylinder is installed outside the arch bracket, and the cylinder rod of the clamping block driving cylinder passes through a through hole provided on the wall of the arch bracket and is fixedly connected to the outer end of the clamping block. This workpiece clamping mechanism clamps and fixes the end of the workpiece through three points.

[0052] The auxiliary support mechanism is installed in the middle of the bed to provide auxiliary support for the workpiece clamped by the workpiece clamping mechanism. This ensures the smooth progress of the shaft and pipe threading process. The auxiliary support mechanism mainly includes two elastic support legs 5.3 and a roller assembly installed at the upper ends of the two elastic support legs. The elastic support legs are composed of a piston cylinder 5.3.4, a piston rod 5.3.1, an upper end cover 5.3.2 and a spring 5.3.3. The piston cylinder is fixed to the bed, and a piston head is provided at the lower end of the piston rod. The piston head is inserted into the inner cavity of the piston cylinder in a movable manner up and down, and the spring is installed between the lower end of the piston head and the inner bottom of the piston cylinder. The upper end cover is fixed to the upper end of the piston cylinder by screws to upper-limit the piston rod and prevent the piston head from extending from the upper end of the piston cylinder. Left and right square grooves are provided at the upper end of the piston rod to support the shaft end portion of the roller assembly. The roller assembly consists of a roller 5.2 and a roller shaft 5.1. The roller is rotatably supported on the roller shaft via bearings, and the roller is provided with left and right V-shaped support surfaces. The roller shaft has square ends at both ends, which are embedded and supported in square grooves at the upper ends of the two piston rods. This auxiliary support mechanism can achieve adaptive upward and downward adjustment based on the gravity of the supported workpiece, providing good applicability.

[0053] The lifting platform mechanism is installed at the rear of the upper end of the bed, and can adjust the upper end support height. It mainly includes a bottom plate 9.13, a top plate 9.1 and a lifting drive mechanism arranged between the bottom plate and the top. In addition, it also includes at least two follow-up auxiliary support mechanisms 9.3. The lifting drive mechanism can adopt multiple groups of hydraulic cylinders, etc. In the present invention, in order to simplify the oil circuit and facilitate control, the lifting drive mechanism includes four groups of scissor mechanisms 9.2, an upper guide rod 9.11, two lower guide rods 9.12, two upper connecting rods 9.4, two lower connecting rods 9.6, two middle connecting rods 9.5, two front and rear drive rods 9.10, two front and rear connecting arms 9.9, a head end connecting arm 9.7 and a hydraulic cylinder 9.8.

[0054] The four-set scissor mechanism consists of four scissor arms. The four scissor arms are located between the top and bottom plates, near the four corners. The lower end of one scissor arm at the bottom of the four-set scissor mechanism is connected to a hinge seat fixed to the bottom plate via a hinge shaft. The lower end of another scissor arm at the bottom of the two front scissor mechanisms and the lower end of another scissor arm at the bottom of the two rear scissor mechanisms are each connected via a lower connecting rod. The upper end of one scissor arm at the top of the four-set scissor mechanism is connected to a hinge seat fixed to the top plate via a hinge shaft. The upper end of another scissor arm at the top of the two front scissor mechanisms and the upper end of another scissor arm at the top of the two rear scissor mechanisms are each connected via an upper connecting rod. Both lower guide rods are fixedly supported above the bottom plate in the front-to-back direction and are arranged parallel to each other. The upper guide rod is fixedly supported in the front-to-back direction at the lower center of the top plate. Two guide holes are provided on each of the two lower connecting rods, and the two guide holes form a guiding fit with the two lower guide rods respectively. A guide hole is provided at the middle position of each of the two upper connecting rods, and the guide holes form a guiding fit with the guide rods. A middle connecting rod is connected to the middle inner connection of the two sets of scissor-type mechanisms at the front and the middle inner connection of the two sets of scissor-type mechanisms at the rear. One end of the front driving rod and the rear driving rod are respectively vertically fixedly connected to the middle of the two middle connecting rods, and the other end of the front driving rod and the rear driving rod are respectively hinged to one end of the front connecting arm and the rear connecting arm, and the other end of the front connecting arm and the rear connecting arm are respectively hinged to the two ends of the head end connecting arm, and the middle of the lower end of the head end connecting arm is vertically fixedly connected to the lever end of the hydraulic cylinder, and the hydraulic cylinder is vertically fixedly mounted on the base plate with the cylinder rod facing upward.

[0055] By adopting this lifting drive mechanism, the cylinder rod of the hydraulic cylinder is extended, which can drive four sets of scissor-type mechanisms to be deployed at the same time, thereby increasing the height of the top support; and by retracting the cylinder rod of the hydraulic cylinder, the four sets of scissor-type mechanisms can be driven to be folded at the same time, thereby lowering the height of the top support, which has the advantage of convenient adjustment; the use of four sets of scissor-type mechanisms ensures the stability of the top support; the use of only one hydraulic cylinder also simplifies the layout of the oil circuit.

[0056] The two sets of follow-up auxiliary support mechanisms are used to provide follow-up support to the front drive rod and the rear drive rod respectively, which can improve the stability of the transmission of the two drive rods and better meet the support requirements of the large platform.

[0057] The follow-up auxiliary support mechanism mainly includes two support arms 9.3.2, two rod sleeves 9.3.1, two springs 9.3.6, two spring pressure covers 9.3.5, and a compression spring installation box.

[0058] The compression spring mounting box is composed of a box bottom 9.3.4 and a box cover 9.3.3 that are fastened together and connected by screws, forming a spring mounting cavity inside. The box bottom is fixedly connected to the base plate of the lifting platform mechanism. Inwardly extending spring guide columns are provided on the front and rear side walls of the box bottom, and a long slot is provided in the middle of the top of the box cover. Two springs are respectively fitted onto the two spring guide columns. The outer ends of the two springs are respectively pressed into contact with the inner walls of the spring mounting cavity on the corresponding side, and the inner ends of the two springs are respectively press-fitted into a spring pressure cover. The two spring pressure covers are integrally provided with upwardly angled outriggers away from the corresponding springs. The two outriggers extend from the long slots on the box cover. The ends of the two outriggers are respectively hinged to the lower ends of a support arm. The two supports are staggered. The upper ends of the two support arms are respectively hinged to the lower arms of the two rod sleeves. The two rod sleeves can slide linearly and are fitted onto the corresponding drive rods. Both support arms are composed of two parallel rotating long strips connected by an intermediate shaft. The two rod sleeves consist of a cylindrical sleeve portion and a lower extension arm integrally connected to the sleeve portion. This follow-up auxiliary support mechanism synchronously drives the two rod sleeves upward or downward as the drive rod moves upward or downward. The force of the two springs acts on the drive rod through the corresponding support arm and rod sleeve, providing follow-up auxiliary support for the drive rod.

[0059] The inner mold support platform is fixedly mounted above the top plate of the lifting platform mechanism. Four left and right support legs 7.4 are located at the bottom of the inner mold support platform. A positioning groove 7.1, extending in the front-to-back direction, is positioned at the top. The shape of the positioning groove matches the shape of the sliced ​​inner mold core to facilitate positioning of the sliced ​​inner mold core. Multiple slots 7.2 are evenly spaced in the positioning groove at predetermined intervals along the front-to-back direction. Each slot position is used to mount a corresponding set of clamping mechanisms. Platform surfaces are located on the left and right sides of the positioning groove at the upper end of the inner mold support platform. A guide rail 7.3 extending in the front-to-back direction is fixed to each platform surface.

[0060] The bidirectional clamping mechanism includes two sets of front and rear clamping actuators and a clamping drive mechanism. Both sets of clamping actuators include a gantry 6.6, two hydraulic cylinders 6.4, and two blocking arms 6.5. The two hydraulic cylinders are vertically fixed on the top of the gantry at positions corresponding to the two vertical sides. The lower cylinder rod ends of the two hydraulic cylinders are fixedly connected to the two blocking arms, and the two blocking arms extend horizontally into the interior of the gantry through the long guide grooves on the vertical sides of the gantry. A guide groove 6.6.1 is provided on each side of the lower end of the gantry. Both sets of clamping actuators slide in conjunction with the two guide rails on the inner mold support platform in the front-to-back direction through the two guide grooves at the lower end of the gantry. The two clamping actuators are arranged in parallel front and back.

[0061] The clamping drive mechanism adopts a screw-nut transmission mechanism driven by a motor, including a forward and reverse screw 6.1, two smooth bars 6.2, and a clamping servo motor 6.3. The clamping servo motor is fixedly installed on the inner mold support platform near the rear end. The clamping servo motor is connected to the rear end of the forward and reverse screws. The forward and reverse screws are respectively connected to the threaded holes set on one side of the two door-shaped brackets through forward and reverse threads, so that the two sets of clamping actuators can be driven to move inward or outward at the same time, and the overall clamping or loosening of the slice-type inner mold core can be achieved through four blocking arms. The two smooth bars are respectively installed above the platform surface at the upper end of the inner mold support platform, forming a guiding match with the two door-shaped brackets.

[0062] The staking clamping mechanism comprises multiple sets, one installed at each slotted location on the inner mold support platform. Each set of staking clamping mechanisms comprises a hydraulic cylinder 8.6, a support cover 8.5, two first connecting arms 8.2, two second connecting arms 8.3, two clamping arms 8.1, and a support block 8.4. The hydraulic cylinder is vertically mounted, with its lower end fixed to the top of the lifting platform mechanism. The support cover is fitted over the upper end of the hydraulic cylinder barrel and has a central hole through which the hydraulic cylinder rod extends. The two first connecting arms are arranged symmetrically, their lower ends hinged to two hinged seats located at the top of the support cover via hinge shafts. The support block is fixed to the end of the hydraulic cylinder rod. The upper end of the support block is provided with an arcuate surface that matches the outer contour of the sliced ​​inner mold core. Hinge seats are located on either side of the arcuate surface, each hinged to one end of the two second connecting arms via a hinge shaft. The other ends of the two second connecting arms are hinged to the middle of the two first connecting arms, respectively. The other ends of the two first connecting arms are fixedly connected to the lower ends of the two clamping arms. The two clamping arms are symmetrically arranged. The inner sides of the upper portions of the two clamping arms are provided with arc-shaped clamping surfaces that match the outer contour of the sliced ​​inner mold core. Furthermore, a distance sensor 8.7 is fixed to the front side of the support cover of each assembly tube clamping mechanism.

[0063] By adopting this managed clamping mechanism, when the cylinder rod of the hydraulic cylinder is extended, the support block can be driven upward. During the upward movement of the support block, the two first connecting arms are driven to rotate inward, and the two clamping arms are synchronously driven to swing inward. When the arc surface of the support block contacts the lower part of the outer contour surface of the slice-type inner mold core, the arc-shaped clamping action surfaces of the two clamping arms form clamping contact with both sides of the slice-type inner mold core.

[0064] The working process of this auxiliary assembly equipment:

[0065] The equipment is divided into two process steps. The first process is to insert the center axis into the center of the inner mold and perform axial positioning. The second process is to insert the sliced ​​inner mold core assembled in the first process into the inside of the tube blank (stator tube to be processed), thus completing the entire working content of the equipment.

[0066] First process:

[0067] 1. First place all the required inner mold pieces on the inner mold support table;

[0068] 2. The hydraulic cylinder of the bidirectional clamping mechanism drives the arm to start moving, and stops when the hydraulic cylinder reaches the maximum stroke.

[0069] 3. Start the servo motor of the bidirectional clamping mechanism, and drive the gantry at both ends to move in the center through the forward and reverse screws. The movement stops when the blocking arms at both ends clamp the slice-type inner mold.

[0070] 4. Place the required center shaft 10 into the workpiece clamping mechanism. The end of the center shaft away from the inner mold support table is driven by the hydraulic cylinder to clamp the jaws, and the other end of the center shaft is aligned with the center hole of the inner mold piece.

[0071] 5. The servo motor of the slide drive mechanism drives the workpiece clamping mechanism on the support slide to move together through the lead screw, completing the process of the mandrel inserting several inner mold pieces in the first process to form a sliced ​​inner mold core 11;

[0072] In order to ensure the linearity of the central axis movement, an auxiliary support mechanism is added to the end of the bed close to the inner mold support platform, and the central axis is supported by the roller at the upper end of the auxiliary support mechanism;

[0073] Fix one end of the center shaft with a nut.

[0074] Second process:

[0075] 1. Raise the hydraulic cylinder of the bidirectional clamping mechanism to its original position, so that the blocking arm is out of contact with the end face of the slice-type inner mold at the corresponding end; then start the servo motor of the bidirectional clamping mechanism, and drive the gantry and its parts back to the initial position through the forward and reverse lead screws;

[0076] 2. The hydraulic cylinder of the custody clamping mechanism is raised until the connecting rods on both sides clamp the sliced ​​inner mold core assembled in the first process, and then the hydraulic cylinder of the custody clamping mechanism stops moving;

[0077] 3. The hydraulic cylinder of the lifting platform mechanism descends and stops when it reaches the same height as the hydraulic cylinder of the hosting clamping mechanism;

[0078] 4. Place the stator tube 12 to be processed into the workpiece clamping mechanism. The hydraulic cylinder of the workpiece clamping mechanism starts to move, and the roller of the auxiliary support mechanism provides support. The hydraulic cylinder stops when the end of the tube is clamped.

[0079] 5. Start the servo motor of the slide drive mechanism and drive the workpiece clamping mechanism on the support slide to move through the lead screw;

[0080] 6. Measure the distance from one end of the tube blank away from the workpiece clamping mechanism through the distance sensor fixed on the support cover of the hosting clamping mechanism;

[0081] 7. When the first hosting clamping mechanism is 20 cm away from the end of the tube far away from the workpiece clamping mechanism, the first hydraulic cylinder starts to move downward. When the hydraulic cylinder descends more than 1 mm in thickness of the tube, it stops. At this time, the hosting clamping mechanism plays the role of supporting the tube.

[0082] 8. As the tube continues to advance, the hydraulic cylinder of the tube holding mechanism at the rear moves in the same manner as described in 7;

[0083] 9. When the slide drive mechanism finishes moving, the sliced ​​inner mold core assembled in the first process has not completely entered the interior of the corrugated tube. At this time, the hydraulic cylinder of the non-supporting clamping mechanism in the clamping mechanism is lowered to the initial position;

[0084] 10. The two hydraulic cylinders near one end of the servo motor in the bidirectional clamping mechanism move downward. When the stroke reaches its maximum, the hydraulic cylinders stop. The servo motor is started, and the reverse lead screw drives the gantry and its parts to move in the center. The arm drives the slice-type inner mold to completely enter the corrugated tube, and the servo motor stops.

[0085] 11. Move the hydraulic cylinder of the bidirectional clamping mechanism close to the servo motor upward to the initial position and stop, start the servo motor, and drive the gantry and its parts back to the original position through the forward and reverse screws, and the second process is completed.

[0086] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. An auxiliary assembly device for a slice-type inner mold used in the forming process of a screw drill stator, characterized by: It includes a bed, a lifting platform mechanism, an inner mold support platform, a two-way clamping mechanism, a hosting clamping mechanism, a workpiece clamping mechanism, a supporting slide, a slide drive mechanism and an auxiliary support mechanism; The support slide is movably mounted on the front part of the upper end of the bed in the front-to-back direction and is connected to the slide drive mechanism; the workpiece clamping mechanism is used to clamp the front end of the workpiece to be inserted; the workpiece clamping mechanism is mounted on the upper end of the support slide; the auxiliary support mechanism is mounted in the middle position of the bed, and the auxiliary support mechanism is an elastic support mechanism that can be adjusted up and down, and is used to support the rear part of the workpiece to be inserted; The lifting platform mechanism is installed at the rear part of the upper end of the bed; the inner mold support platform is fixedly installed at the upper end of the lifting platform mechanism, and the upper part of the inner mold support platform has a positioning groove extending in the front-to-back direction, and the shape of the positioning groove matches the shape of the slice-type inner mold core; a plurality of slots are evenly distributed at the positioning groove along the front-to-back direction according to the set intervals, and each slot position corresponds to a set of hosting clamping mechanisms; The bidirectional clamping mechanism is mounted on the upper end of the inner mold support platform; it includes two sets of front and rear clamping actuators and a clamping drive mechanism; the front and rear clamping actuators are movably mounted above the inner mold support platform in the front and rear directions, respectively, for limiting the front and rear ends of the inner mold core composed of multiple inner mold pieces; the clamping drive mechanism is drivingly connected to the front and rear clamping actuators; The working process of the auxiliary assembly equipment includes a first process and a second process, wherein the first process is to insert the central shaft into the center of the inner mold piece and perform axial fixation; The second process is to insert the sliced ​​inner mold core assembled in the first process into the tube blank, wherein: The first process includes: first, placing the required center shaft on the workpiece clamping mechanism, clamping the end of the center shaft away from the inner mold support table by the workpiece clamping mechanism, and aligning the other end of the center shaft with the center hole of the inner mold piece; then, the servo motor of the slide drive mechanism drives the workpiece clamping mechanism on the support slide via the lead screw to complete the process of the first process in which the center shaft is inserted into several inner mold pieces to form a sliced ​​inner mold core, and then fixing one end of the center shaft with a nut; The second process includes: after completing the first process, the workpiece clamping mechanism moves in the opposite direction and resets; then the stator tube blank to be processed is placed on the workpiece clamping mechanism, the end of the tube blank is clamped by the workpiece clamping mechanism, and the tube blank is supported by the auxiliary support mechanism; then the servo motor of the slide drive mechanism is started, and the workpiece clamping mechanism on the support slide is driven by the screw to move, so as to insert the slice-type inner mold core into the interior of the tube blank.

2. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1 is characterized in that: A slide is provided at the front of the upper end of the bed, and a slide groove of matching shape is provided at the lower end of the supporting slide. The supporting slide forms a linear sliding fit with the slide along the front-rear direction of the bed through the slide groove.

3. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1 is characterized in that: The slide drive mechanism is arranged on one side of the supporting slide and adopts a screw-nut transmission mechanism driven by a servo motor; a threaded hole along the front-back direction is provided on one side of the supporting slide, and the screw and the threaded hole form a threaded fit, and the servo motor is fixed on the corresponding side of the bed, and the servo motor is connected to one end of the screw through a coupling, and the screw is supported on support frames located at both ends; the support frames at both ends are fixed to the sides of the bed.

4. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1 is characterized in that: The workpiece clamping mechanism includes an arched bracket and three groups of clamping assemblies; an outer edge is provided at the lower part of the arched bracket, which is fixedly connected to the upper end of the supporting slide by screws; the three groups of clamping assemblies are composed of two groups relatively installed on both sides of the arched bracket and one group installed on the top of the arched bracket; each group of clamping assemblies includes a clamping block and a clamping block driving cylinder, the clamping block is provided inside the arched bracket, the clamping block driving cylinder is installed outside the arched bracket, and the cylinder rod of the clamping block driving cylinder passes through a through hole provided on the wall of the arched bracket and is fixedly connected to the outer end of the clamping block.

5. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1 is characterized in that: The auxiliary support mechanism includes two elastic support legs that can move up and down and a roller assembly installed at the upper ends of the two elastic support legs; the elastic support legs are composed of a piston cylinder, a piston rod, an upper end cover and a spring; the piston cylinder is fixed to the bed, and a piston head is provided at the lower end of the piston rod, which is inserted into the inner cavity of the piston cylinder in a movable manner up and down, and the spring is installed between the lower end of the piston head and the inner bottom of the piston cylinder; the upper end cover is fixed to the upper end of the piston cylinder by screws; a square groove is provided at the upper end of the piston rod; the roller assembly is composed of a roller and a roller shaft, and the roller is rotatably supported on the roller shaft through a bearing, and left and right V-shaped support surfaces are provided on the roller; square shaft ends are used at both ends of the roller shaft, and the square shaft ends at both ends are embedded and supported in the square grooves at the upper ends of the two piston rods.

6. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1, characterized in that: The lifting platform mechanism includes a bottom plate, a top plate and a lifting drive mechanism arranged between the bottom plate and the top plate.

7. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 6, characterized in that: At least two follow-up auxiliary support mechanisms are provided between the bottom plate and the top; the follow-up auxiliary support mechanism includes two support arms, two rod sleeves, two springs, two spring pressure covers, and a compression spring installation box; the compression spring installation box is composed of a box bottom and a box cover that are fastened together and connected by screws, and a spring installation cavity is formed inside; the box bottom is fixedly connected to the bottom plate of the lifting platform mechanism, and inwardly extending guide spring columns are provided on the front and rear side walls inside the box bottom, and a long slot is provided in the middle position of the top of the box cover; the two springs are respectively fitted on the two guide springs On the column, the outer ends of the two springs are respectively pressed into contact with the inner walls of the spring mounting cavities on the corresponding sides, and the inner ends of the two springs are respectively press-fitted with a spring pressure cover; the two spring pressure covers are integrally provided with upwardly inclined outward extension arms away from the corresponding springs, and the two outward extension arms extend from the long slots on the box cover, and the ends of the two outward extension arms are respectively hinged to the lower ends of a support arm, and the two supports are staggered. The upper ends of the two support arms are respectively hinged to the lower extension arms of the two rod sleeves, and the two rod sleeves can slide linearly and are sleeved on the corresponding drive rods of the lifting drive mechanism.

8. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1, characterized in that: The jacking clamping mechanism includes a hydraulic cylinder, a support cover, two first connecting arms, two second connecting arms, two clamping arms, and a support block; the hydraulic cylinder is vertically arranged, and its lower end is fixed on the top of the lifting platform mechanism; the support cover is fixed on the upper end of the cylinder barrel of the hydraulic cylinder, and a center hole for the cylinder rod of the hydraulic cylinder to extend is provided on the support cover; the two first connecting arms are symmetrically arranged on the left and right, and the lower ends of the two first connecting arms are hingedly connected to the two hinge seats provided on the top of the support cover through a hinge shaft; the support block is fixedly installed on the cylinder rod end of the hydraulic cylinder, and the support block The upper end of the block is provided with an arc surface that matches the outer contour of the sliced ​​inner mold core. The support block is located on the left and right sides of the arc surface and has hinge seats, which are hinged to one end of the two second connecting arms through hinge shafts, and the other ends of the two second connecting arms are hinged to the middle parts of the two first connecting arms respectively; the other ends of the two first connecting arms are fixedly connected to the lower ends of the two clamping arms; the two clamping arms are symmetrically arranged; the inner sides of the upper parts of the two clamping arms are provided with arc-shaped clamping action surfaces that match the outer contour of the sliced ​​inner mold core.

9. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 1, characterized in that: The front and rear sets of clamping actuators both include a gantry, two hydraulic cylinders, and two block arms; the two hydraulic cylinders are vertically fixed on the top of the gantry at positions corresponding to the two vertical sides, and the lower cylinder rod ends of the two hydraulic cylinders are fixedly connected to the two block arms, and the two block arms extend horizontally into the interior of the gantry through the long guide grooves on the vertical sides of the gantry; a guide groove is provided on each side of the lower end of the gantry; the two sets of clamping actuators are slidably matched with the two guide rails on the inner mold support platform along the front-to-back direction through the two guide grooves at the lower end of the gantry, and the two sets of clamping actuators are arranged in parallel front to back.

10. The auxiliary assembly equipment for the sliced ​​inner mold for forming the screw drill stator according to claim 9, characterized in that: The clamping drive mechanism adopts a screw-nut transmission mechanism driven by a motor, including forward and reverse screws, two smooth bars, and a clamping servo motor; the clamping servo motor is fixedly installed on the inner mold support platform near the rear end, and the clamping servo motor is connected to the rear end drive of the forward and reverse screws. The forward and reverse screws are threadedly connected with the threaded holes set on one side of the two door-shaped brackets through forward threads and reverse threads respectively; the two smooth bars are respectively installed above the platform surface at the upper end of the inner mold support platform, forming a guiding match with the two door-shaped brackets.

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