Horizontal splicing and pressing system and method for long-specification sand core mold

Abstract

The invention discloses a horizontal splicing and pressing system and method for a long-specification sand core mold, and relates to the technical field of rocket engine shell forming and manufacturing. The system comprises a pressing mechanism walking track, a core shaft fixing and supporting mechanism, a core shaft supporting and lifting mechanism, a pressing mechanism, a sand cake supporting sleeve and the like. And through a horizontal splicing mode, the height limitation of a traditional vertical splicing plant is overcome, and the sand core mold sectional splicing device is suitable for sectional splicing of large-specification and long-size sand core molds. The pressing mechanism is provided with a pressure sensor, the pressing force between the sand cakes can be monitored in real time, and the phenomenon that the end faces of the sand cakes are crushed due to too large pressing force is avoided. According to the method, by means of the system, horizontal splicing and pressing of the sand core mold are achieved, and the operation safety and the production efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rocket engine shell molding and manufacturing, and in particular to a horizontal splicing and pressing system and a pressing method for a long sand core mold. Background Art

[0002] At present, sand molds are widely used in the field of rocket engine shell molding. Sand core molds are mainly used to form the inner holes and cavities of the casing castings, and sand core molds with regular dimensions and a certain length often need to be processed in multiple sections of sand cakes. After the sand cakes are processed in sections, each section of the sand cake needs to be spliced ​​into a complete sand mold in a specific way according to the process.

[0003] In the prior art, the sand core mold is spliced ​​vertically from top to bottom, and the flat end surface of the sand cake is pressed from top to bottom by a jack to firmly splice the sand cakes. This vertical splicing method has the following problems:

[0004] 1. Limited by the size of the factory, it is not possible to splice sand molds with longer sizes;

[0005] 2. The compaction efficiency is low during splicing;

[0006] 3. Vertically operating jacks are not very safe. Summary of the invention

[0007] In order to solve the above technical problems, the purpose of the present invention is to provide a horizontal splicing and pressing system and pressing method for long-sized sand core molds, so as to realize the horizontal splicing and pressing of long-sized sand core molds, overcome the limitations of traditional vertical splicing, and improve the pressing efficiency and operational safety.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] In a first aspect, a horizontal splicing and clamping system for a long sand core mold is provided, comprising:

[0010] The walking track of the clamping mechanism;

[0011] A mandrel fixing support mechanism is provided at the starting end of the travel track of the clamping mechanism and is used to support one end of the mandrel;

[0012] The mandrel support lifting mechanism is arranged at a position where the walking track of the pressing mechanism is arranged along the axial direction, and is used to support the other end of the mandrel;

[0013] The clamping mechanism can move along the running track of the clamping mechanism to clamp the end surface of the sand cake along the axial direction of the core shaft.

[0014] In some optional embodiments of the present invention, the pressing mechanism includes:

[0015] The bottom plate is installed on the walking track of the clamping mechanism;

[0016] A gantry, mounted on the base plate;

[0017] The travel reduction motor is installed on the base plate, and the output shaft is equipped with a travel gear, which cooperates with the rack on the travel track of the clamping mechanism to drive the gantry to move.

[0018] Preferably, the pressing mechanism further comprises:

[0019] The lifting reduction motor is installed on the gantry, driving the lifting shaft to rotate and drive the lifting chain to move cyclically;

[0020] The lifting plate is mounted on the lifting chain and can move up and down along the linear slide;

[0021] A mounting plate, mounted on the lifting plate, equipped with a nut seat, a linear bearing, etc.;

[0022] The clamping drive hand wheel drives the clamping plate forward or backward through the screw rod.

[0023] Further preferably, a pressure sensor is installed on the back of the clamping plate for real-time monitoring of the clamping force.

[0024] Preferably, the pressing mechanism further comprises:

[0025] A turbine screw lifter is arranged on the bottom plate;

[0026] A tensioning seat, arranged at one end of the turbine screw lifter;

[0027] A tension reduction motor is arranged at the other end of the worm screw lifter;

[0028] The tension reduction motor drives the wheel screw lifter to drive the tension seat to move up and down, and tighten with the frame surface in the walking track of the clamping mechanism to resist the reaction force caused by the adhesion of the sand cake.

[0029] In some optional embodiments of the present invention, the mandrel fixing support mechanism includes:

[0030] A support frame is arranged in the middle of the walking track of the clamping mechanism;

[0031] A left and right adjustment fixing block is arranged on the support frame;

[0032] The tightening bolts are arranged on the left and right adjustment fixing blocks and are used to tighten the running track of the clamping mechanism. By adjusting the distance of the tightening bolts, the distance between the support frame and the running track of the clamping mechanism can be adjusted.

[0033] Preferably, the mandrel fixing support mechanism further comprises:

[0034] A lower V support seat is installed on the support frame and is used to support the mandrel;

[0035] The upper V-type pressing seat is hinged to one end of the lower V-type supporting seat through a hinge rod, and the other end is provided with a handle and a lifting eye nut.

[0036] Further preferably, the core shaft fixing support mechanism also includes a live knot bolt, which is installed on the lower V support seat and cooperates with the eye nut to fix the upper V clamping seat.

[0037] Further preferably, the upper V-type pressing seat can be flipped 90 degrees around the hinge rod.

[0038] In some optional embodiments of the present invention, the system further comprises a sand cake support sleeve, wherein the sand cake support sleeve is disposed between the mandrel fixing support mechanism and the mandrel and is used for supporting the flat end surface of the first section of the sand cake.

[0039] In a second aspect, a method for horizontally splicing and compacting a long sand core mold applied to any system described in the first aspect is provided, comprising:

[0040] One end of the mandrel is supported by a mandrel fixing support mechanism, and the other end is supported by a support lifting mechanism;

[0041] The plurality of sand cakes are sequentially inserted onto the mandrel along the axial direction of the mandrel;

[0042] Control the clamping mechanism to move to a specified position along the clamping mechanism travel track;

[0043] The end surface of each sand cake section on the core shaft is compressed by a compression mechanism.

[0044] In some optional embodiments of the present invention, the first sand cake is axially limited by a positioning step on the core shaft, and the last sand cake is axially compressed and limited by a shaft end nut.

[0045] In some optional embodiments of the present invention, bonding glue is coated between adjacent sand cakes.

[0046] In some optional embodiments of the present invention, during the compaction process, the compaction force between the sand cakes is detected by a pressure sensor.

[0047] In some optional embodiments of the present invention, the method further comprises:

[0048] The tensioning seat is driven to move upward by the turbine screw lift, so that the tensioning seat and the frame surface in the walking track of the clamping mechanism are tightened to resist the reaction force caused by the adhesion of the sand cake.

[0049] The beneficial effects of the present invention are:

[0050] The invention realizes the horizontal splicing and pressing of long sand core molds, avoids the limitation of the traditional vertical splicing method, improves the production efficiency and operation safety, and has broad application prospects.

[0051] 1. The horizontal splicing method reduces the height limit of the plant compared to the vertical splicing, and can be used for the segmented splicing of large-sized and long-sized sand core molds;

[0052] 2. The high-altitude jack pressing in vertical splicing is changed to a horizontal pressing mechanism, and the sand mold is supported by a worm screw lift, which significantly improves the operation safety and pressing efficiency;

[0053] 3. The horizontal clamping mechanism is equipped with a pressure sensor, which can monitor the clamping force between sand cakes in real time to avoid the end surface of the sand cake being crushed due to excessive clamping force and ensure the quality of splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0055] Figure 1 It is a schematic diagram of the compaction process of horizontal splicing of sand core molds;

[0056] Figure 2 It is a structural schematic diagram of the horizontal pressing device of the sand core mold of the present invention;

[0057] Figure 3 It is a structural schematic diagram of the mandrel fixing support mechanism;

[0058] Figure 4 It is a structural schematic diagram of the clamping mechanism;

[0059] Figure 5 yes Figure 4 AA section view;

[0060] In the figure: 1, the walking track of the clamping mechanism; 200, the mandrel fixing support mechanism; 3, the sand cake support sleeve; 4, the sand cake; 500, the clamping mechanism; 6, the mandrel; 7, the support lifting mechanism; 8, the shaft end nut;

[0061] Among them: 201, support frame; 202, left and right adjustment fixing block; 203, top bolt; 204, lower V support seat; 205, hinge rod; 206, limit nut; 207, flip angle limit plate; 208, upper V clamping seat; 209, handle; 210, eye nut; 211, slipknot bolt; 501, tension seat; 502, travel gear; 503, tension reduction motor; 504, lower limit; 505, linear slide rail; 506, gantry; 507, lifting plate; 508, upper Limit; 509, anti-fall device; 510, upper lifting bearing seat; 511, lifting shaft; 512, lifting reduction motor; 513, clamping plate; 514, lifting chain; 515, drag chain plate 16, drag chain; 517, lower lifting bearing seat; 518, travel reduction motor; 519, clamping drive hand wheel; 520, linear bearing; 521, mounting plate; 522, pressure sensor; 523, screw; 524, guide shaft; 525, nut seat; 526, turbine screw lift; 527, bottom plate. DETAILED DESCRIPTION

[0062] The technical solution of the present invention including the preferred technical solution is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] Example 1

[0064] like Figure 1 As shown, the sand core mold includes a core shaft 6, a sand cake 4, and a shaft end nut 8. First, the core shaft 6 is horizontally supported by the core shaft fixing support mechanism 200 and the support lifting mechanism 7. One end of the core shaft 6 is fixed on the core shaft fixing support mechanism 200, and the other end is supported by a plurality of support lifting mechanisms 7 to achieve horizontal positioning of the core shaft 6.

[0065] Next, the sand cakes 4 are sequentially installed on the mandrel 6 along the mandrel 6. The first sand cake 4 is axially limited by the positioning step on the mandrel 6, and the flat end surface of the first sand cake 4 is supported by the sand cake support sleeve 3. Special bonding glue is evenly applied on the end surfaces of the remaining sand cakes 4, and then they are sequentially installed on the mandrel 6 until the required length is reached.

[0066] like Figure 1 and Figure 2As shown, the present invention provides a horizontal splicing and clamping system for a long sand core mold, comprising a clamping mechanism walking track 1, a core shaft fixing support mechanism 200, a core shaft support lifting mechanism 7 and a clamping mechanism 500. The core shaft fixing support mechanism 200 is arranged at the starting end of the clamping mechanism walking track 1, and is used to support one end of the core shaft 6; the core shaft support lifting mechanism 7 is arranged at a position along the axial arrangement of the clamping mechanism walking track 1, and is used to support the other end of the core shaft 6; the clamping mechanism 500 can move along the clamping mechanism walking track 1, and clamp the end surface of the sand cake 4 along the axial direction of the core shaft 6.

[0067] Specifically, Figure 4 and Figure 5 As shown, the clamping mechanism 500 includes a bottom plate 527, a gantry 506 and a travel reduction motor 518. The bottom plate 527 is mounted on the travel track 1 of the clamping mechanism; the gantry 506 is mounted on the bottom plate 527; the travel reduction motor 518 is mounted on the bottom plate 527, and a travel gear 502 is mounted on its output shaft, which cooperates with the rack on the travel track 1 of the clamping mechanism to drive the gantry 506 to move.

[0068] Furthermore, the clamping mechanism 500 also includes a lifting reduction motor 512, a lifting plate 507, a mounting plate 521 and a clamping drive hand wheel 519. The lifting reduction motor 512 is mounted on the gantry 506, driving the lifting shaft 511 to rotate, driving the lifting chain 514 to move in a circular motion; the lifting plate 507 is mounted on the lifting chain 514, and can move up and down along the linear slide rail 505; the mounting plate 521 is mounted on the lifting plate 507, and is equipped with a nut seat 525, a linear bearing 520, etc.; the clamping drive hand wheel 519 drives the clamping plate 513 forward or backward through the screw rod 523.

[0069] After the sand cake 4 is loaded, the clamping mechanism 500 is started. The clamping mechanism 500 can move along the clamping mechanism travel track, and the travel gear 502 is driven by the travel reduction motor 518 to cooperate with the rack on the clamping mechanism travel track to achieve accurate positioning of the clamping mechanism 500.

[0070] The gantry 506 in the clamping mechanism 500 is installed on the bottom plate 527, and a lifting reduction motor 512 is installed on the gantry 506. The lifting reduction motor 512 drives the lifting shaft 511 to rotate, driving the lifting chain 514 to move cyclically, and the lifting chain 514 is connected to the lifting plate 507. The lifting plate 507 can move up and down along the linear slide rail 505 to adjust the height of the clamping mechanism 500 so that the center of the clamping plate 513 is aligned with the center of the sand cake 4 to be compressed, so as to adapt to sand cakes 4 of different diameters.

[0071] In this embodiment, a pressure sensor 522 is installed on the back of the pressing plate 513 for real-time monitoring of the pressing force. This design can effectively avoid the problem of the end surface of the sand cake 4 being crushed due to excessive pressing force.

[0072] First support the mandrel 6 at several points, then the sand cake 4 along Figure 1 In the direction of the axis, it passes through a certain section of the core shaft 6. Except that the first sand cake 4 is axially limited by the positioning step on the core shaft 6, and the last sand cake is axially compressed and limited by the shaft end nut 8, the remaining sand cakes are bonded with special glue and compressed as follows. Figure 1 The sand cake pressing surface makes the sand cakes firmly bonded to each other and prevent axial movement.

[0073] Example 2

[0074] On the basis of Example 1, Figure 4 and Figure 5 As shown, the clamping mechanism 500 further includes a worm screw lift 526, a tensioning seat 501 and a tensioning reduction motor 503. The worm screw lift 526 is disposed on a bottom plate 527; the tensioning seat 501 is disposed at one end of the worm screw lift 526; and the tensioning reduction motor 503 is disposed at the other end of the worm screw lift 526.

[0075] During operation, the tension reduction motor 503 drives the turbine screw lift 526 to drive the tension seat 501 to move up and down, and tighten with the frame surface in the walking track 1 of the clamping mechanism, so as to resist the reaction force caused by the adhesion of the sand cake 4.

[0076] During the clamping process, the operator rotates the clamping driving hand wheel 519 to drive the screw 523 to rotate. The screw 523 cooperates with the nut seat 525 to convert the rotational motion into linear motion, driving the clamping plate 513 to move forward and apply a clamping force to the end face of the sand cake 4. The pressure sensor 522 monitors the size of the clamping force in real time to avoid damage to the end face of the sand cake 4 due to excessive clamping force.

[0077] In order to resist the reaction force caused by the adhesion of the sand cake 4, the clamping mechanism 500 also includes a turbine screw lift 526 installed on the bottom plate 527. One end of the turbine screw lift 526 is connected to the tension seat 501, and the other end is connected to the tension reduction motor 503. When the tension reduction motor 503 is started, the turbine screw lift 526 is driven to drive the tension seat 501 to move up and down. The tension seat 501 moves upward and is tightened with the frame surface in the walking track of the clamping mechanism to form a reaction support.

[0078] Example 3

[0079] like Figure 3 As shown, the spindle fixing support mechanism 200 in this embodiment is used to support one end of the spindle 6, and its structure includes:

[0080] The support frame 201 is placed in the middle of the travel track of the clamping mechanism;

[0081] Left and right adjustment fixing block 202, mounted on support frame 201;

[0082] The tightening bolts 203 are installed on the left and right adjustment fixing blocks 202 to tighten the running track of the clamping mechanism. By adjusting the distance of the tightening bolts 203, the distance between the support frame 201 and the running track of the clamping mechanism can be adjusted to align the core shaft fixing support mechanism 200 with the support lifting mechanism 7.

[0083] The support frame 201 is arranged in the middle of the pressing mechanism running track 1; the left and right adjustment fixing blocks 202 are arranged on the support frame 201; the jacking bolts 203 are arranged on the left and right adjustment fixing blocks 202 for jacking the pressing mechanism running track 1. By adjusting the distance of the jacking bolts 203, the distance between the support frame 201 and the pressing mechanism running track 1 can be adjusted.

[0084] The spindle fixing support mechanism 200 also includes a lower V support seat 204 and an upper V pressing seat 208. The lower V support seat 204 is installed on the support frame 201 and is used to support the spindle 6; the upper V pressing seat 208 is hinged to one end of the lower V support seat 204 through a hinge rod 205, and the other end is equipped with a handle 209 and a lifting eye nut 210.

[0085] In addition, the mandrel fixing support mechanism 200 also includes a slipknot bolt 211, which is mounted on the lower V support seat 204 and cooperates with the eye nut 210 to fix the upper V pressing seat 208. The upper V pressing seat 208 can be turned 90 degrees around the hinge rod 205 to facilitate the installation and removal of the mandrel 6.

[0086] The lower end of the mandrel 6 is supported on the lower V support seat 204, and the upper end is clamped and limited by the upper V clamping seat 208. The upper V clamping seat 208 is hinged to one end of the lower V support seat 204 through the hinge rod 205, and the other end is equipped with a handle 209 and a lifting ring nut 210. The operator can use the handle 209 to turn the upper V clamping seat 208 around the hinge rod 205 by 90 degrees, and then fix it with the live knot bolt 211 installed on the lower V support seat 204 through the lifting ring nut 210 to achieve the clamping and limiting of the mandrel 6 to prevent it from circumferential movement.

[0087] Example 4

[0088] This embodiment provides a method for horizontally splicing and pressing a long sand core mold, and the specific steps are as follows:

[0089] One end of the mandrel 6 is supported by the mandrel fixing support mechanism 200, and the other end is supported by the support lifting mechanism 7;

[0090] The plurality of sand cakes 4 are sequentially inserted into the mandrel 6 along the axial direction of the mandrel 6;

[0091] Control the clamping mechanism 500 to move to a specified position along the clamping mechanism walking track 1;

[0092] The end surface of each sand cake 4 on the core shaft 6 is pressed by the pressing mechanism 500 .

[0093] In this embodiment, the first sand cake 4 is axially limited by the positioning step on the core shaft 6, and the last sand cake 4 is axially compressed and limited by the shaft end nut 8. Adhesive glue is applied between adjacent sand cakes 4 to enhance the connection strength.

[0094] During the pressing process, the pressing force between the sand cakes 4 is detected by the pressure sensor 522 to ensure that the pressing force is within a suitable range. At the same time, the tensioning seat 501 is driven upward by the turbine screw lifter 526 to tighten the tensioning seat 501 and the frame surface in the walking track 1 of the pressing mechanism to resist the reaction force caused by the adhesion of the sand cakes 4.

[0095] Example 5

[0096] This embodiment introduces a method for horizontally splicing and pressing a long sand core mold, and the specific steps are as follows:

[0097] Step 1: Fixing and supporting the mandrel

[0098] One end of the core shaft 6 is mounted on the core shaft fixing support mechanism 200 , and the other end is supported by a plurality of support lifting mechanisms 7 to ensure horizontal support and precise positioning of the core shaft 6 .

[0099] Step 2: Wearing and bonding of sand cakes

[0100] The first sand cake 4 is installed on the mandrel 6 through the sand cake support sleeve 3, and the axial position is limited by the positioning step on the mandrel 6. The remaining sand cakes 4 are installed along the mandrel 6 in turn, and the end surface of each sand cake 4 is evenly coated with special bonding glue to bond with the adjacent sand cakes 4.

[0101] Step 3: Adjustment and positioning of the clamping mechanism

[0102] The height and position of the clamping mechanism 500 are adjusted according to the diameter and position of the sand cake 4. The clamping mechanism 500 drives the travel gear 502 through the travel reduction motor 518 to move along the travel track of the clamping mechanism to the end surface position of the sand cake 4 to be compressed. The lifting reduction motor 512 drives the lifting chain 514 to move and adjust the height of the clamping plate 513 so that its center is aligned with the center of the sand cake 4.

[0103] Step 4: Press the end surface of the sand cake

[0104] The operator rotates the clamping driving hand wheel 519, and through the rotation of the screw rod 523, the clamping plate 513 is driven to move forward, and an appropriate clamping force is applied to the end face of the sand cake 4. The pressure sensor 522 monitors the size of the clamping force in real time to ensure that the clamping force is moderate to avoid crushing the end face of the sand cake 4.

[0105] Step 5: Repeat the pressing operation

[0106] Repeat steps 3 and 4 according to the number of sand cakes 4, and press the end surface of each sand cake 4 in turn to ensure that each sand cake 4 is firmly bonded.

[0107] Step 6: Complete the splicing of the sand core mold

[0108] After all the sand cakes 4 are spliced ​​together, the shaft end nut 8 is installed to axially compress and limit the last section of the sand cake 4 to complete the horizontal splicing of the entire sand core mold.

[0109] Step 7: Resistance to Reaction Force

[0110] During the clamping process, the tensioning reduction motor 503 is started to drive the turbine screw lift 526, which drives the tensioning seat 501 to move upward, so that the tensioning seat 501 and the frame surface in the walking track of the clamping mechanism are tightened to resist the reaction force caused by the adhesion of the sand cake 4 and ensure the stability of the clamping mechanism 500.

[0111] Through the above method, the horizontal splicing and compacting of long sand core molds is achieved, avoiding the limitations of traditional vertical splicing methods, improving production efficiency and operational safety, and having broad application prospects.

[0112] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A horizontal splicing and pressing system for long sand core molds, characterized in that: include: The walking track of the clamping mechanism; A mandrel fixing support mechanism is provided at the starting end of the travel track of the clamping mechanism and is used to support one end of the mandrel; The mandrel support lifting mechanism is arranged at a position where the walking track of the pressing mechanism is arranged along the axial direction, and is used to support the other end of the mandrel; The clamping mechanism can move along the running track of the clamping mechanism to clamp the end surface of the sand cake along the axial direction of the core shaft.

2. The system according to claim 1, characterized in that The clamping mechanism comprises: The bottom plate is installed on the walking track of the clamping mechanism; A gantry, mounted on the base plate; The travel reduction motor is installed on the base plate, and the output shaft is equipped with a travel gear, which cooperates with the rack on the travel track of the clamping mechanism to drive the gantry to move.

3. The system according to claim 2, characterized in that The clamping mechanism also includes: The lifting reduction motor is installed on the gantry, driving the lifting shaft to rotate and drive the lifting chain to move cyclically; The lifting plate is mounted on the lifting chain and can move up and down along the linear slide; A mounting plate, mounted on the lifting plate, having a nut seat and a linear bearing mounted thereon; The clamping drive hand wheel drives the clamping plate forward or backward through the screw rod.

4. The system according to claim 3, characterized in that A pressure sensor is mounted on the back of the pressing plate to monitor the pressing force in real time.

5. The system according to claim 1, characterized in that The clamping mechanism also includes: A turbine screw lifter is arranged on the bottom plate; A tensioning seat, arranged at one end of the turbine screw lifter; A tension reduction motor is arranged at the other end of the worm screw lifter; The tension reduction motor drives the worm screw lifter, which drives the tension seat to move up and down, and tightens the frame surface in the walking track of the clamping mechanism.

6. The system according to claim 1, characterized in that The core shaft fixing support mechanism comprises: A support frame is arranged in the middle of the walking track of the clamping mechanism; A left and right adjustment fixing block is arranged on the support frame; The tightening bolts are arranged on the left and right adjustment fixing blocks and are used for tightening the walking track of the clamping mechanism.

7. The system according to claim 6, characterized in that The core shaft fixing support mechanism also includes: A lower V support seat is installed on the support frame and is used to support the mandrel; The upper V-type pressing seat is hinged to one end of the lower V-type supporting seat through a hinge rod, and the other end is provided with a handle and a lifting eye nut.

8. A method for horizontally splicing and compacting a long sand core mold, applied to the system according to any one of claims 1 to 9, comprising the following steps: One end of the mandrel is supported by a mandrel fixing support mechanism, and the other end is supported by a support lifting mechanism; Multiple sand cakes are sequentially placed on the mandrel along the axial direction of the mandrel, and bonding glue is applied between adjacent sand cakes; Control the clamping mechanism to move to the specified position along the clamping mechanism travel track, and adjust the height of the clamping mechanism so that the center of the clamping plate is aligned with the center of the sand cake; The end surface of each sand cake on the mandrel is compressed by the compression mechanism, and the pressure sensor monitors the compression force in real time; Repeat steps 1 and 2 to press each sand cake end face in turn until all sand cakes are spliced ​​together; Install the shaft end nut to axially tighten and limit the last section of sand cake.

9. The method according to claim 8, characterized in that By adjusting the rotation angle of the compaction drive handwheel, the compaction force can be controlled to avoid crushing the end surface of the sand cake due to excessive compaction force.

10. The method according to claim 8, characterized in that During the clamping process, the tensioning reduction motor is started to drive the turbine screw elevator, which drives the tensioning seat to move upward and tighten with the frame surface in the walking track of the clamping mechanism to resist the reaction force caused by the adhesion of the sand cake.

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