Tool for seamless steel tube cold-rolling mill mandril clamping jaw installing machine

Abstract

The utility model discloses a tool for a seamless steel tube cold rolling machine core rod clamping jaw installing machine. The tool comprises a balance support, a connecting base and an adjusting screw rod. The top surface of the connecting seat is rectangular; the balance support comprises a hanging ring, a hanging ring rod, a balance rod, a connecting rod, a first horizontal rod and a second horizontal rod. The lower ends of the two hanging ring rods are respectively connected to two corner positions at the rear end of the length direction of the connecting seat; the lower ends of the two balance rods are connected to the two corner positions of the front end in the length direction of the connecting base respectively. Two ends of the connecting rods are respectively connected to the hanging ring rod and the balancing rod on the same side in the length direction of the connecting seat; the two ends of the first horizontal rod are connected with the upper ends of the two balance rods respectively. Two ends of the second horizontal rod are respectively connected with the upper ends of the two hanging ring rods; the lifting ring is arranged in the middle of the second horizontal rod; and the adjusting screw rod is arranged on the connecting seat. On the basis of ensuring the mounting quality and efficiency of the mandril clamping jaw, the repeated labor intensity is reduced, and the potential safety hazard is eliminated.

Description

Technical Field

[0001] The utility model relates to cold rolling production equipment for producing seamless steel pipes in metallurgy and machinery industries, and more specifically to a tooling for installing mandrel clamping claws of a seamless steel pipe cold rolling machine. Background Art

[0002] Seamless steel pipe is a common metallurgical metal product. The cold rolling technology of seamless steel pipe has become the main method of production and processing of seamless steel pipe due to its high rolling precision, fast speed, large production capacity, high yield rate, easy production organization and process technology adjustment.

[0003] The two-roller cyclic cold rolling mill is a commonly used cold rolling equipment for seamless steel pipes. It is mainly composed of a feed rotary mechanism, a rolling mechanism, a transmission mechanism, a mandrel rotary mechanism, a bed support mechanism, a feeding and blanking mechanism, a hydraulic system, a process lubrication system, an electrical automation control system, a pneumatic system, and auxiliary mechanisms. The feed rotary mechanism consists of a mandrel chuck device, an angle input and output device, a feed and rotary cam device, a worm gear (worm) rod pair, a feed rocker device, a box, and a hydraulic and lubrication system. It is installed in a feed rotary gear box as a set. Its function is to decompose the power output by the main motor into horizontal feed motion and synchronous rotation motion in the rolling of seamless steel pipes, output the synchronous motion of feed (horizontal displacement) and rotation (radial rotation) required for the rolling deformation of seamless steel pipes, and output the corresponding vector kinetic energy after deceleration and change of direction.

[0004] like Figure 1 and Figure 2 As shown, the mandrel chuck device is mainly composed of a main shaft 1, a rotating sleeve, a chuck head 2 and other components, with a total length of about 2m and a slender structure, wherein the main shaft 1 is a slender hollow shaft, the chuck head 2 is composed of mandrel claws 21, guide cylinder, support sleeve, rolling bearing, distance ring, end cover, swing rod and other components, the rotating sleeve is composed of a cylinder, rolling bearing, gear, distance ring, support ring and other components, the chuck head 2 and the rotating sleeve are sequentially directional mounted on the main shaft 1, and the swing rod outside the chuck head 2 is connected to the hydraulic cylinder, and the piston rod of the hydraulic cylinder reciprocates horizontally, driving the chuck head 2 to move horizontally back and forth on the main shaft 1, realizing the opening and closing functions of the mandrel claws. The mandrel claws 21 are in the open state to provide a channel for the mandrel and the seamless steel pipe (tube blank) coated on its outer circumferential surface to enter the middle bed, and the mandrel claws 21 are closed to lock the mandrel, prevent the mandrel from escaping in the horizontal direction and drive the mandrel to rotate.

[0005] In production practice, a seamless steel tube cold rolling mill usually rolls multiple specifications of products. Each specification must correspond to a matching mandrel, and each specification of the mandrel must also correspond to a matching mandrel claw to ensure the locking stability of the mandrel under rolling conditions and meet the technical requirements of cold rolling deformation processing. Therefore, replacing the mandrel claw is a common and necessary process in the production of seamless steel tube cold rolling pipes.

[0006] like Figure 3 and Figure 4 As shown, the mandrel clamping claw 21 is composed of a clamping claw body 211 and a slide plate 212. The clamping claw body 211 is made of die steel, and the surface is heat-treated and tempered to enhance its strength and wear resistance. The clamping claw body 211 is a right-angled trapezoid, and rectangular grooves are processed equidistantly and continuously on the plane of the right-angled long side, such as a right-angled sawtooth shape; the groove width, groove depth and spacing are consistent with the outer diameter, inner diameter and spacing of the mandrel sawtooth section. Three circular threaded blind holes are processed equidistantly on the hypotenuse plane corresponding to the right-angled long side, and the hole diameter and hole spacing match the step through hole on the slide plate, and the axis of the threaded blind hole is perpendicular to the inclined surface. The spacing between the right-angled long side and the hypotenuse needs to be processed according to the rolling specifications. The slide plate 212 is made of brass alloy and is rectangular. Three step through holes are processed vertically with equal diameter and equal distance on the rectangular plane. The thickness of the rectangular body matches the T-slot of the mandrel clamping head guide cylinder (clearance fit, preferably 0.05-0.10mm). The slide plate 212 is connected and fastened to the claw body 211 by means of a hexagon socket flat base bolt 213, and is integrally installed in the T-slot of the chuck guide cylinder at the front end of the mandrel chuck shaft. The three claws form a set and are equally divided at 120 degrees, thereby achieving the function of completely containing and clamping the mandrel.

[0007] When used on site, the slide plays a role in positioning and guiding in the guide cylinder of the chuck, and the claw body is responsible for clamping the core rod. Driven by the hydraulic cylinder, the guide cylinder of the chuck moves horizontally back and forth on the main axis of the core rod chuck shaft, pressing down or lifting up the claw, thereby realizing the opening and closing of the claw.

[0008] At present, the replacement of mandrel claws is all done manually. There is no automated disassembly and assembly equipment in the industry. Operators need to squat on the relay bed to perform disassembly and assembly operations. As a common process of cold rolling production line equipment, the current operation method can meet the requirements of regular replacement of mandrel claws, but there are still some shortcomings, namely:

[0009] 1) When the claw is installed on the machine, it is easy to slip and there is a safety hazard: the surface of the claw body is smooth, and only the long sides of the slide board can be held flatly with both hands. The width difference between the claw body and the slide board is 10mm. When lubricating oil is applied on both sides (to facilitate the claw body to enter the chuck guide cylinder and reduce friction), it is easy to slip by relying on the step edge of the slide board and the claw body to hold and lift it. At this time, the operator is half-squatting on the relay bed, and the movement is restrained, resulting in delayed or limited reaction, which is easy to cause mechanical injury or object impact and other injuries.

[0010] 2) The weight of the single claw body is large, and the repetitive labor intensity of manual operation is high: after the mandrel claw is assembled (including the claw body and the slide plate), the single weight of the LG-220H cold rolling mill claw is 11kg, and the LG-150H cold rolling mill claw is 8.5kg. The labor intensity of continuously installing 3 sets of mandrel claws on the machine is high under relatively cramped working conditions, and due to the limitations of the work station and working conditions, only one person can work, and others cannot cooperate, which consumes a lot of physical energy. If it falls out of the hand accidentally, it will cause a production safety accident.

[0011] 3) It is inconvenient to center the mandrel clamping claw during installation: There is a T-slot divided into three equal parts on the guide tube of the mandrel clamping head. During installation, the slide is aligned with the top rectangular slot on the T-slot, and the clamping claw body is aligned with the lower rectangular slot on the T-slot. It is difficult to align the two slots at the same time. At the same time, it requires high physical strength to lift and center by people, which affects the work efficiency.

[0012] In summary, the replacement of mandrel claws is a common process in the production of seamless steel pipe cold rolling, and the operation frequency is high. Due to the working conditions, the weight of the claws and other reasons, the labor intensity is high during on-site disassembly and assembly, there are safety hazards, and the operation efficiency is affected. Utility Model Content

[0013] In view of the defects existing in the prior art, the purpose of the utility model is to provide a tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill, which can reduce the intensity of repetitive labor and eliminate safety hazards on the basis of ensuring the quality and efficiency of the installation of the mandrel clamping jaws.

[0014] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0015] A tooling for installing a mandrel clamping claw of a seamless steel pipe cold rolling mill, comprising a balancing bracket, a connecting seat and an adjusting screw;

[0016] The top surface of the connecting seat is configured as a rectangle;

[0017] The balancing support comprises a lifting ring, a lifting ring rod, a balancing rod, a connecting rod, a first horizontal rod and a second horizontal rod;

[0018] The said lifting ring rods are provided with two, symmetrically arranged, and the lower ends thereof are respectively connected to the two corner positions at the rear end of the length of the said connecting seat;

[0019] The said balancing rods are provided with two symmetrically arranged ones, and the lower ends thereof are respectively connected to the two corner positions of the length of the said connecting seat toward the front end;

[0020] The connecting rods are provided with two, symmetrically arranged, and the two ends thereof are respectively connected to the eye rod and the balance rod on the same side of the length of the connecting seat;

[0021] The two ends of the first horizontal rod are respectively connected to the upper ends of the two balance rods;

[0022] The two ends of the second horizontal rod are respectively connected to the upper ends of the two lifting ring rods;

[0023] The lifting ring is arranged at the middle position of the second horizontal rod;

[0024] The adjusting screw is arranged on the connecting seat.

[0025] Preferably, the connecting seat includes a supporting plate and a positioning column;

[0026] The support plate is configured as a rectangle, and a circular threaded hole is provided at the center thereof;

[0027] There are four positioning columns, the upper ends of which are respectively connected to the four corners of the support plate, and the inner sides of the lower ends are provided with rectangular grooves.

[0028] Preferably, the length of the support plate does not exceed 2 / 3 of the length of the corresponding claw body.

[0029] Preferably, the diameter and pitch of the circular threaded hole are matched with those of the adjusting screw.

[0030] Preferably, the width of the rectangular groove = the thickness of the slide plate + 0.3-0.5 mm;

[0031] The depth of the rectangular groove is 10 to 12 mm from the bottom surface to the outer side surface of the positioning column;

[0032] The depth of the rectangular groove = the width of the slide plate - the thickness of the claw body + 1.0 to 2.0 mm, and the depth of the rectangular groove does not exceed 1 / 3 to 1 / 2 of the width of the positioning column.

[0033] Preferably, the eye bar, the balance bar, the connecting bar, the first horizontal bar and the second horizontal bar are all stainless steel pipes;

[0034] The diameter of the stainless steel tube is 10-12 mm, and the wall thickness is 2.5-3.0 mm.

[0035] Preferably, the length of the balance bar is 15 to 30 mm longer than the length of the ring bar;

[0036] The length of the connecting rod is 20-25 mm shorter than the length of the eyebolt rod;

[0037] The lengths of the first horizontal rod and the second horizontal rod are consistent with the width of the supporting plate.

[0038] Preferably, the angle between the inner side of the lifting ring rod and the horizontal plane is 55-60°;

[0039] The included angle between the outer side of the balance pole and the horizontal plane is 35-40°.

[0040] Preferably, one end of the connecting rod is connected to a position 2 / 5 from the top of the eye rod, and the other end is connected to a position 2 / 3 from the top of the balance rod.

[0041] Preferably, a hand wheel is provided at the upper end of the adjusting screw, and the lower end is screwed into the circular threaded hole.

[0042] The utility model provides a seamless steel pipe cold rolling mill mandrel clamping claw installation tool, which has the following advantages:

[0043] Beneficial effects:

[0044] 1) Reasonable design, compact structure, good clamping stability of mandrel claws, easy centering angle adjustment, convenient operation, low requirements on skills and physical strength, and easy on-site operation;

[0045] 2) It consists of three functional parts, namely, a balancing bracket, a connecting seat and an adjusting screw. It uses a combination of special tooling and lifting machinery to achieve accurate and efficient installation of various types of claw bodies;

[0046] 3) The welded balance bracket is fixed on the connecting seat, connected to the lifting rigging by the lifting ring in the middle of the lifting ring rod, the balance rod plays the role of angle adjustment and centering, and the connecting rod connects the lifting ring rod and the balance rod into a whole to ensure strength and rigidity;

[0047] 4) The balance bracket is made of stainless steel pipe, which is lighter than round steel, which is beneficial to the overall weight reduction and portability of the utility model design and easy on-site operation and adjustment;

[0048] 5) The connecting seat contains and clamps the top slide of the mandrel claw through the rectangular groove inside the rectangularly distributed positioning column, so as to realize the functions of overall lifting and lightering;

[0049] 6) The adjusting screw uses a triangular thread to position the clamped mandrel claws to prevent the mandrel claws from slipping during installation, especially during angle adjustment. It has good anti-slip and anti-falling effects and is safe and reliable.

[0050] 7) On the basis of eliminating potential safety hazards, it reduces the intensity of repetitive labor, increases the operating efficiency by more than double, and meets the requirements of orderly production of seamless steel pipe cold rolling production line, which is practical and efficient;

[0051] 8) According to the length, thickness and width of the slide plates of various types of mandrel claws, the corresponding connecting seats are prepared to meet the fast, accurate, efficient and safe operation of installing and replacing mandrel claws of various types;

[0052] 9) It has strong versatility and has certain reference and application value for improving the core rod clamping claw installation operation mode and equipment in the feed rotary mechanism of the current similar two-roller periodic seamless steel tube cold rolling mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of an existing mandrel chuck device;

[0054] Figure 2 yes Figure 1 Schematic diagram of the K direction;

[0055] Figure 3 It is a structural schematic diagram of the existing mandrel clamping claw;

[0056] Figure 4 yes Figure 3 Schematic diagram of the middle DD direction;

[0057] Figure 5 It is a schematic diagram of the main view of the tooling for installing the mandrel clamping claws of a seamless steel tube cold rolling mill of the utility model;

[0058] Figure 6 It is a top view schematic diagram of a tooling for installing a mandrel clamping claw of a seamless steel tube cold rolling mill of the utility model;

[0059] Figure 7 It is a left view schematic diagram of a tooling for installing a mandrel clamping claw of a seamless steel tube cold rolling mill of the utility model;

[0060] Figure 8 It is a schematic diagram of the main view of the connecting seat in the tooling for installing the mandrel clamping claw of the seamless steel tube cold rolling mill of the utility model;

[0061] Fig. 9 It is a top view schematic diagram of a connecting seat in a tooling for installing a mandrel clamping claw of a seamless steel tube cold rolling mill of the utility model;

[0062] Fig.10 It is a schematic diagram of the working state of the tooling for installing the mandrel clamping claws of the seamless steel tube cold rolling mill of the utility model;

[0063] Fig.11 yes Fig.10 Schematic diagram of the left side;

[0064] Fig.12 The utility model is a schematic diagram of the installation of a tooling for installing a mandrel clamping claw of a seamless steel pipe cold rolling mill. DETAILED DESCRIPTION

[0065] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0066] Combination Figures 5 to 7As shown, the utility model provides a tooling for installing the mandrel clamping claws of a seamless steel pipe cold rolling mill, which comprises a balancing bracket, a connecting seat 3 and an adjusting screw 4.

[0067] The balancing bracket is formed by welding a lifting ring 5, a lifting ring rod 6, a balancing rod 7, a connecting rod 8, a first horizontal rod 9 and a second horizontal rod 10.

[0068] There are two eyelet rods 6 which are symmetrically arranged with equal lengths, and the lower ends of the eyelet rods 6 are respectively connected to the two corner positions at the rear end of the length of the connecting seat 3.

[0069] There are two balancing rods 7 which are symmetrically arranged with equal lengths, and the lower ends of the balancing rods 7 are respectively connected to the two corner positions of the length of the connecting seat 3 toward the front end.

[0070] There are two connecting rods 8 which are symmetrically arranged with equal length, and two ends of the connecting rods 8 are respectively connected to the eye rod 6 and the balance rod 7 on the same side of the length of the connecting seat 3.

[0071] There are one first horizontal rod 9 and one second horizontal rod 10, which are of equal length, and the length is consistent with the width of the support plate 31 of the connection seat 3. The two ends of the first horizontal rod 9 are respectively connected to the upper ends of the two balance rods 7, and the two ends of the second horizontal rod 10 are respectively connected to the upper ends of the two eyebolt rods 6.

[0072] The material of the hanging ring 5 is Q235A, and it is a concentric ring, and its inner ring is welded to the middle position of the second horizontal rod 10 .

[0073] The eye rod 6, the balance rod 7, the connecting rod 8, the first horizontal rod 9 and the second horizontal rod 10 are all stainless steel pipes. The diameter of the stainless steel pipe is 10-12 mm and the wall thickness is 2.5-3.0 mm.

[0074] The length of the balance rod 7 is 15 to 30 mm longer than that of the eye rod 6 , and the length of the connecting rod 8 is 20 to 25 mm shorter than that of the eye rod 6 .

[0075] Combination Figures 7 to 9 As shown, the connecting seat 3 is made of Q235A and is formed by welding a supporting plate 31 and a positioning column 32 .

[0076] The support plate 31 is set to be rectangular, and the length of the support plate 31 cannot exceed 2 / 3 of the length of the corresponding claw body. A circular threaded hole 33 is opened at its center position. The center of the circular threaded hole 33 coincides with the center of gravity of the support plate 31, and the aperture and pitch of the circular threaded hole 33 are consistent with the adjustment screw 4.

[0077] There are four positioning posts 32 , the upper ends of which are respectively connected to the four corners of the support plate 31 , and the inner side surfaces of the lower ends are each provided with a rectangular groove 34 .

[0078] The width of the rectangular groove 34 = the thickness of the slide plate + 0.3-0.5 mm.

[0079] The depth of the rectangular groove 34 is 10 to 12 mm from the bottom surface to the outer side surface of the positioning column 32 .

[0080] The depth of the rectangular groove 34 = the width of the slide plate - the thickness of the claw body + 1.0-2.0 mm, and the depth of the rectangular groove 34 does not exceed 1 / 3-1 / 2 of the width of the positioning column 32 .

[0081] The width, depth, and distance from the end surface of the four rectangular grooves 34 and the four positioning columns 32 should be consistent, and the error value should not be greater than 0.20 mm.

[0082] A hand wheel 41 is disposed at the upper end of the adjusting screw rod 4 , and the lower end thereof is screwed into the circular threaded hole 33 .

[0083] The utility model seamless steel tube cold rolling mill mandrel clamping claw installation tooling needs to be assembled in advance when in use, namely:

[0084] 1) Assembly of the connection seat 3: Place the support plate 31 flat on a dedicated platform, with the rectangular grooves 34 of the four positioning columns 32 facing inward and in an upper position, and vertically place them at the four corners of the support plate 31, and the right angles of the positioning columns 32 are flush with the right angles of the support plate 31, spot weld pre-installed, and welded after calibration. To ensure the welding installation accuracy, a template with a width = slide width + 2mm can be inserted into the rectangular grooves 34 of the four positioning columns 32 for assembly welding.

[0085] 2) Assembly of the balancing bracket: First, weld the first horizontal rod 9 and the second horizontal rod 10 to the top of the two balancing rods 7 and the two eyebolt rods 6 respectively. When welding, the two end surfaces of the first horizontal rod 9 and the second horizontal rod 10 are flush with the outer diameters of the balancing rods 7 and the eyebolt rods 6 on both sides; then, place the welded connecting seat 3 flat on a special platform with the four positioning columns 32 facing downward; thereafter, place the side of the eyebolt rod 6 where the second horizontal rod 10 is not welded flat on a side plane of the support plate 31 of the connecting seat 3, and flush with the side end surface. , and weld it after tilting inwards by 55 to 60 degrees; then place the side of the balance rod 7 where the first horizontal rod 9 is not welded flat on the other side of the support plate 31 of the connecting seat 3, and flush with the end face of the side, and weld it after tilting outwards by 35 to 40 degrees; then weld the two connecting rods 8 between the eye rod 6 and the balance rod 7 respectively, wherein the welding point of the eye rod 6 should be set at 2 / 5 of the distance from the top, and the welding point of the balance rod 7 should be set at 2 / 3 of the distance from the top; finally, weld the eye 5 in the center on the second horizontal rod 10.

[0086] 3) Pre-install the adjusting screw 4: screw the threaded section of the adjusting screw 4 into the circular threaded hole 33 of the supporting plate 31 .

[0087] In this way, the assembly of the parts of the tooling for installing the mandrel clamping claw of the seamless steel tube cold rolling mill of the utility model is completed, and it can be put into the seamless steel tube cold rolling production site for the online installation of the mandrel clamping claw. Figures 10 to 12 As shown, when used on site, the four positioning columns 32 of the tooling 100 for installing the mandrel clamping jaws of the seamless steel tube cold rolling mill of the utility model are clamped on the slide 212 of the mandrel clamping jaws 21, and the adjustment screw 4 is screwed after the manual displacement to the rear position of the middle of the slide 212 (ensuring that the front end slide 212 is exposed to the positioning column by at least 20 mm), and the lower end surface of the adjustment screw 4 is tightly fitted with the top surface of the slide 212 and pre-tightened, so that the gap between the slide 212 and the rectangular groove 34 of the positioning column 32 can be eliminated, and the positioning protection and anti-falling effect can be achieved. Then, the sling is connected to the lifting ring 5 by using a shackle, and the tooling 100 for installing the mandrel clamping jaws of the seamless steel tube cold rolling mill of the utility model and the mandrel clamping jaws 21 are hoisted and transported as a whole to the end face of the mandrel chuck shaft of the feed rotary mechanism by using a lifting machinery. At this time, the operator manually lifts the first horizontal bar 9 on the top of the balance bar 7, and can easily adjust the angle of the mandrel claw 21 to accurately and quickly align it with the T-slot of the chuck guide cylinder of the mandrel chuck shaft. After inserting the front end of the mandrel claw 21 into the T-slot, loosen the adjusting screw 4, and the mandrel claw 21 can be separated from the mandrel claw 21 by the utility model. Then, the mandrel claw 21 is pushed into the T-slot as a whole, and after rotating the mandrel chuck shaft, the online installation of the other two mandrel claws 21 is completed in sequence.

[0088] It should be noted that: due to the different widths, thicknesses and lengths of the mandrel clamping slides used in various types of seamless steel tube cold rolling mills, it is necessary to set the corresponding mandrel clamping machine tooling according to different equipment. Adjustable positioning columns can also be used to achieve one tooling to meet the installation needs of multiple seamless steel tube cold rolling mills.

[0089] The utility model has a reasonable design for the tooling for installing the mandrel claw of a seamless steel tube cold rolling mill, a compact and light structure, good clamping stability of the mandrel claw, easy centering angle adjustment, convenient operation, low requirements on skills and physical strength, easy on-site operation, good anti-slip and anti-fall effects, safety, reliability, practicality and efficiency. On the basis of eliminating potential safety hazards, it reduces the intensity of repetitive labor, improves the operating efficiency by more than double, meets the requirements for orderly production of the seamless steel tube cold rolling production line, and promotes the inherent safety of the equipment and the safety of inspection and maintenance operations. It consists of three functional parts, namely, a balance bracket, a connecting seat, and an adjusting screw. It uses a combination of special tooling and lifting machinery to achieve accurate and efficient installation of various types of claw bodies. The welded balance bracket is fixed on the connecting seat, connected to the lifting rigging by the lifting ring in the middle of the lifting ring rod, and the balance rod plays the role of angle adjustment and centering. The connecting rod connects the lifting ring rod and the balance rod into a whole to ensure strength and rigidity. The connecting seat contains and clamps the top slide of the mandrel claw through the rectangular groove inside the rectangular positioning column, realizing the function of overall lifting and barging. The adjusting screw uses a triangular thread to position the clamped mandrel claw, preventing the mandrel claw from slipping during installation, especially during angle adjustment, and has a good anti-skid and anti-falling effect. According to the length, thickness, and width of the slide of various types of mandrel claws, the corresponding connecting seat is prepared to meet the fast, accurate, efficient, and safe installation and replacement of multiple types of mandrel claws. It has strong versatility and has certain reference and application value for the improvement of the core rod clamping claw installation operation mode and equipment in the feed rotary mechanism of the current similar two-roller periodic seamless steel tube cold rolling mill.

[0090] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A tool for installing mandrel clamps of a seamless steel tube cold rolling mill, characterized in that: It includes a balancing bracket, a connecting seat and an adjusting screw; The top surface of the connecting seat is configured as a rectangle; The balancing support comprises a lifting ring, a lifting ring rod, a balancing rod, a connecting rod, a first horizontal rod and a second horizontal rod; The said lifting ring rods are provided with two, symmetrically arranged, and the lower ends thereof are respectively connected to the two corner positions at the rear end of the length of the said connecting seat; The said balancing rods are provided with two symmetrically arranged ones, and the lower ends thereof are respectively connected to the two corner positions of the length of the said connecting seat toward the front end; The connecting rods are provided with two, symmetrically arranged, and the two ends thereof are respectively connected to the eye rod and the balance rod on the same side of the length of the connecting seat; The two ends of the first horizontal rod are respectively connected to the upper ends of the two balance rods; The two ends of the second horizontal rod are respectively connected to the upper ends of the two lifting ring rods; The lifting ring is arranged at the middle position of the second horizontal rod; The adjusting screw is arranged on the connecting seat.

2. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 1, characterized in that: The connecting seat includes a supporting plate and a positioning column; The support plate is configured as a rectangle, and a circular threaded hole is provided at the center thereof; There are four positioning columns, the upper ends of which are respectively connected to the four corners of the support plate, and the inner sides of the lower ends are provided with rectangular grooves.

3. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 2, characterized in that: The length of the supporting plate does not exceed 2 / 3 of the length of the corresponding claw body.

4. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 2, characterized in that: The hole diameter and thread pitch of the circular threaded hole are matched with those of the adjusting screw.

5. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 3, characterized in that: The width of the rectangular groove = the thickness of the slide plate + 0.3-0.5 mm; The depth of the rectangular groove is 10 to 12 mm from the bottom surface to the outer side surface of the positioning column; The depth of the rectangular groove = the width of the slide plate - the thickness of the claw body + 1.0 to 2.0 mm, and the depth of the rectangular groove does not exceed 1 / 3 to 1 / 2 of the width of the positioning column.

6. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 2, characterized in that: The eye bar, the balance bar, the connecting bar, the first horizontal bar and the second horizontal bar are all stainless steel pipes; The diameter of the stainless steel tube is 10-12 mm, and the wall thickness is 2.5-3.0 mm.

7. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 6, characterized in that: The length of the balance bar is 15 to 30 mm longer than the length of the ring bar; The length of the connecting rod is 20-25 mm shorter than the length of the eyebolt rod; The lengths of the first horizontal rod and the second horizontal rod are consistent with the width of the supporting plate.

8. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 6, characterized in that: The angle between the inner side of the lifting ring rod and the horizontal plane is 55-60°; The included angle between the outer side of the balance pole and the horizontal plane is 35-40°.

9. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 6, characterized in that: One end of the connecting rod is connected to a position 2 / 5 of the distance from the top of the eye rod, and the other end is connected to a position 2 / 3 of the distance from the top of the balance rod.

10. The tooling for installing the mandrel clamping jaws of a seamless steel tube cold rolling mill according to claim 4, characterized in that: The upper end of the adjusting screw is provided with a hand wheel, and the lower end is screwed into the circular threaded hole.

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