Drill rod machining equipment

Abstract

The utility model provides drill rod machining equipment, and relates to the technical field of drill rod machining. The drill rod machining equipment is used for turning threads on a drill rod, a plurality of planes are arranged on the drill rod in the axial direction, and the drill rod machining equipment comprises an auxiliary clamping device and a lathe body comprising a center frame. The auxiliary clamping device is detachably mounted on the center frame; the auxiliary clamping device comprises a transition sleeve and a plurality of bolt fasteners. The transition sleeve is used for sleeving a drill rod; and the plurality of bolt fasteners are in threaded connection with the transition sleeve and are jointly used for clamping a plurality of planes of the drill rod. According to the drill rod machining equipment, the problem that in the thread turning process, the stability and the machining precision of the drill rod are difficult to reach the expected machining standard is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drill rod processing, in particular to a drill rod processing equipment. BACKGROUND

[0002] Drill rods are widely used in tunnel special equipment rock drilling jumbo, which is a key consumable in the construction process, and the consumption is considerable. Traditionally, the worn drill rods are often treated as waste, causing great waste of resources.

[0003] The production of drill rods usually relies on special lathes, and the cost of new drill rods is high. Reusing the waste drill rods by threading can improve their service life through repeated processing, which is an effective way to improve the economy of drill rods. However, drill rods are slender shafts with non-cylindrical surface characteristics, and ordinary lathes have difficulty in clamping such workpieces, resulting in that the stability and processing precision of the drill rods during threading cannot meet the expected processing standards. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a drill rod processing equipment to solve the problem that the stability and processing precision of the drill rod during threading cannot meet the expected processing standards.

[0005] The present application provides a drill rod processing equipment, which is used for threading drill rods, and the drill rod is provided with multiple planes in the axial direction. The drill rod processing equipment comprises:

[0006] An auxiliary clamping device and a lathe body comprising a center stand; the auxiliary clamping device is detachably installed on the center stand;

[0007] The auxiliary clamping device comprises a transition sleeve and multiple bolt fasteners; the transition sleeve is used for sleeving on the drill rod; the multiple bolt fasteners are threadedly connected to the transition sleeve, and the multiple bolt fasteners are used for clamping the multiple planes of the drill rod.

[0008] In a possible design, the multiple bolt fasteners form a cylindrical surface array on the transition sleeve;

[0009] In the axial direction of the drill rod, the cylindrical surface array is composed of at least two rows of bolt fasteners;

[0010] In the radial direction of the drill rod, the cylindrical surface array is composed of multiple columns of bolt fasteners.

[0011] In a possible design, the number of columns of the cylindrical surface array is the same as the number of planes of the drill rod.

[0012] In a possible design, the transition sleeve is a hollow cylindrical workpiece.

[0013] In a possible design, each bolt fastener comprises an adjusting bolt and a fastening nut.

[0014] Each adjusting bolt penetrates through the transition sleeve, and the plurality of adjusting bolts are collectively used for aligning the drill rod, and each fastening nut is used for locking the corresponding adjusting bolt.

[0015] In a possible design, each fastening nut is arranged on the outer surface of the transition sleeve.

[0016] In a possible design, the center frame comprises a multi-prong telescopic ejector rod.

[0017] The multi-prong telescopic ejector rod is used for clamping the transition sleeve.

[0018] In a possible design, the lathe body further comprises a sliding guide rail and a threaded turning tool assembly.

[0019] The center frame further comprises a first sliding block, and the threaded turning tool assembly further comprises a second sliding block.

[0020] The sliding guide rail is provided with a limiting block, and the first sliding block and the second sliding block are respectively located on two sides of the limiting block.

[0021] The position of the limiting block on the sliding guide rail is determined according to the length of the threaded turning of the drill rod.

[0022] In a possible design, the target end of the drill rod is pre-processed with an outer cylinder and a central hole coaxial with the outer cylinder.

[0023] The lathe body further comprises a chuck jaw and a tailstock center.

[0024] The chuck jaw is used for clamping the outer contour of the drill rod, and the tailstock center is used for tightly pressing the central hole of the drill rod.

[0025] In a possible design, a fence is further included.

[0026] The fence is detachably installed on the lathe body.

[0027] The drill rod machining device provided by the application comprises a lathe main body, a center stand and an auxiliary clamping device. The center stand is slidably connected to the lathe main body, and the auxiliary clamping device is detachably installed on the center stand. The auxiliary clamping device comprises a transition sleeve and a plurality of bolt fasteners. The transition sleeve is used for sleeving on the drill rod. The plurality of bolt fasteners are threadedly connected to the transition sleeve, and the plurality of bolt fasteners are used for clamping a plurality of planes of the drill rod. The following technical effects are achieved: the drill rod is clamped on the center stand by the auxiliary clamping device, so that the problem that the drill rod has relatively weak rigidity due to the relatively large length-diameter ratio of the drill rod is solved; the plurality of planes of the drill rod are clamped by the plurality of bolt fasteners of the auxiliary clamping device, so that the problem that the relative positional relationship between the center stand and the planes of the drill rod is difficult to keep accurate is solved; the transition sleeve is clamped by the support point of the center stand, so that the problem that the drill rod is fixed relative to the support point during thread machining is solved BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0029] Figure 1 The scene schematic diagram of the drill rod machining device provided by the embodiment of the present application is shown.

[0030] Figure 2 The structure schematic diagram of the drill rod machining device provided by the embodiment of the present application is shown.

[0031] Figure 3 The principle schematic diagram of the drill rod installed on the center stand provided by the embodiment of the present application is shown.

[0032] Figure 4 The structure schematic diagram of the auxiliary clamping device provided by the embodiment of the present application is shown.

[0033] Figure 5 The side view of the auxiliary clamping device provided by the embodiment of the present application is shown.

[0034] Figure 6 The sectional view of the auxiliary clamping device provided by the embodiment of the present application is shown.

[0035] Figure 7 The flowchart of the drill rod machining method provided by the embodiment of the present application is shown.

[0036] REFERENCE SIGNS:

[0037] 100-drill rod; 200-drill rod machining device

[0038] 210 - auxiliary clamping device; 211 - transition sleeve; 212 - bolt fastener; 2121 - adjusting bolt; 2122 - fastening nut;

[0039] 220 - lathe body; 221 - center stand; 2211 - multi-jaw telescopic ejector rod; 2212 - first sliding block; 222 - sliding guide rail; 2221 - limiting block; 223 - threaded turning tool assembly; 2231 - second sliding block; 224 - chuck dog; 225 - tailstock center. DETAILED DESCRIPTION

[0040] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that the exemplary embodiments can be practiced without these specific details. In some instances, well-known structures and functions have not been described in detail in order to avoid obscuring the understanding of the exemplary embodiments.

[0041] In the present application, the terms "first", "second", and the like are used to distinguish between similar or identical items or elements having substantially the same function and role. Those skilled in the art will understand that the terms "first", "second", and the like do not limit the number and execution order, and the terms "first", "second", and the like do not necessarily mean different. It should be noted that the words "exemplary" or "for example" in the present application are used to indicate an example, illustration, or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present the relevant concept in a specific manner. In the present application, "at least one" means one or more, and "multiple" means two or more.

[0042] It should be noted that "at the time" in the present application can be at the moment when a certain condition occurs, or within a certain period of time after the occurrence of a certain condition, which is not limited in the present application. In addition, the drill rod processing equipment provided in the present application is only an example, and the drill rod processing equipment can also include more or less content.

[0043] In order to clearly describe the technical solutions of the present application, the following briefly introduces some terms and technologies involved in the present application:

[0044] Rock drilling jumbo: a special equipment specially used for rock drilling in underground engineering such as tunnels and mines. The rock drilling jumbo integrates drilling, advancing and rotating functions, and realizes efficient and accurate rock drilling operation through hydraulic or electric drive. The rock drilling jumbo improves the speed and safety of underground engineering.

[0045] Drill rod: A slender, elongated tool used for rock drilling operations, typically made of high-strength alloy steel. It connects to the percussion or rotary mechanism of a rock drill at one end and contacts the rock through a drill bit at the other end, transmitting energy to break the rock. Drill rods withstand significant impact and torque during drilling and are key consumables in rock drilling operations.

[0046] Specialized lathe: A lathe designed specifically for the manufacture of drill rods and threading tasks. Specialized lathes usually have specific fixtures, tools, and control systems to accommodate the processing needs of drill rods.

[0047] General lathe: A lathe with versatility, capable of processing a variety of different shapes and sizes of workpieces. This type of lathe usually has a relatively simple structure and is suitable for general cutting, drilling, and milling tasks. The flexibility of general lathes is higher, but their processing efficiency and precision may be lower compared to specialized lathes.

[0048] Threading processing: A processing method that cuts threads on drill rods through a lathe. During threading, the drill rod is clamped between the spindle and tailstock of the lathe, and the thread turning tool assembly moves along the surface of the drill rod at a certain speed and feed rate, cutting the desired thread shape.

[0049] The technical solutions of the present application will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes may not be repeated in some examples. The present application will be described below with reference to the accompanying drawings.

[0050] In order to clearly understand the technical solutions of the present application, the prior art solutions will be described in detail.

[0051] Drill rods are widely used in tunnel special equipment rock drilling jumbos. During drilling, drill rods need to withstand high-frequency impacts from rock drills, physical friction from hole walls and rock debris, and the scouring and corrosion effects of drainage water. These factors can cause drill rods to gradually wear and fatigue fracture. Therefore, drill rods are key consumables in the construction process, with considerable consumption. Traditionally, worn drill rods are often treated as waste, resulting in significant waste of resources.

[0052] At present, the production of drill rods with non-cylindrical characteristics usually relies on special lathes, which leads to high cost of newly manufactured drill rods. Therefore, rethreading and recycling of waste drill rods to improve their service life through repeated machining has become an effective way to improve the economy of drill rods. During the rethreading process, the damaged parts of the waste drill rods due to wear and fatigue fracture need to be cut off, and then the drill rods need to be rethreaded. If necessary, multiple modified drill rods can be connected through connecting sleeves and other connecting parts to ensure that the length of the modified drill rods meets the processing or use standards.

[0053] Since the drill rod users usually do not have special lathes for rethreading of drill rods, they can only rely on ordinary lathes to rethread the waste drill rods. It is difficult for ordinary lathes to clamp such workpieces, which makes it difficult for the stability and machining accuracy of the drill rods to meet the expected machining standards during the rethreading process. This mainly manifests in the following aspects:

[0054] Firstly, the length-diameter ratio of the drill rod is relatively large, which makes its rigidity relatively weak. During machining, the drill rod is easily bent and deformed under the action of cutting force, its own gravity and centrifugal force when rotating. At the same time, the cross-sectional area of the drill rod is small, and its ability to resist bending deformation is also relatively weak.

[0055] Secondly, the drill rod has multiple planes in the axial direction, which makes it difficult to maintain the relative positional relationship between the center rest and each plane accurately during machining. At the same time, stress concentration may occur in the transition area between these planes, further affecting the stability and machining accuracy of the drill rod.

[0056] Thirdly, the support points of the center rest clamp the outer contour of the drill rod, which makes the drill rod fixed relative to the center rest, and limits the rotation of the drill rod during rethreading, making it impossible to be machined.

[0057] Therefore, in order to solve the problem that the stability and machining accuracy of the drill rod are difficult to meet the expected machining standards during the rethreading process, it is found in the research that an auxiliary clamping device is added to the ordinary lathe. The device aims to ensure the stability and machining accuracy of the drill rod during the rethreading process, so that the ordinary lathe can machine the drill rod with non-cylindrical characteristics, realizing the rethreading and recycling of waste drill rods based on the ordinary lathe, thereby improving the service life of the drill rod through repeated machining. In addition, the auxiliary clamping device is designed to be easy to install and remove, and has the characteristics of being recycled, further improving its practicality and economy.

[0058] Based on the above creative findings, the technical scheme of the present application is proposed.

[0059] The application scenario of the drill rod machining equipment provided by the present application is introduced as follows.

[0060] Figure 1 The scene schematic diagram of the drill rod processing equipment provided by the embodiment of the present application is shown. It should be noted that, Figure 1 The scene shown is only an example of the scene to which the present application can be applied, to help those skilled in the art understand the technical content of the present application, but it does not mean that the present application cannot be used in other devices, systems, environments or scenes.

[0061] As Figure 1 shown, the application scenario includes a drill rod 100 and a drill rod processing equipment 200.

[0062] The drill rod 100 is an elongated shaft workpiece with a non-cylindrical surface feature, and is a key component connecting a drill bit and a rock drilling jumbo. The drill rod 100 is mainly used to transmit the impact force and torque of the rock drilling jumbo to break rocks and form a borehole. Generally, the shape of the drill rod 100 includes hexagonal hollow steel and hollow round steel, and the inscribed circle diameter of the hexagonal hollow steel is usually 22mm or 25mm, and the outer diameter of the hollow round steel is 32mm or 38mm.

[0063] The drill rod processing equipment 200 is a machining tool specially used for thread turning, which realizes the machining of threads on the drill rod 100 through the rotation of the main shaft and the feeding of the cutter.

[0064] The drill rod processing equipment 200 mainly consists of a bed, a main shaft box, a feeding box, a cutter holder and a cooling and lubricating system. The bed is the basis of the drill rod processing equipment 200, which has good rigidity, good stability and is not easy to deform; the main shaft box is an important part of the drill rod processing equipment 200, which is used to install the main shaft and transmit power, has high precision, small vibration and stable transmission; the feeding box is a mechanism for controlling the feeding of the cutter, which is used to adjust the feeding speed and direction of the cutter, has high transmission precision and accurate positioning; the cutter holder is the part for installing and adjusting the cutter, which is used to clamp the cutter and perform cutting machining, has convenient operation and accurate positioning; the cooling and lubricating system is an important part for ensuring the normal operation of the drill rod processing equipment 200, which is used to cool and lubricate the cutter and the workpiece to improve the machining quality and the service life of the cutter.

[0065] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0066] Figure 2 The structure schematic diagram of the drill rod processing equipment provided by the embodiment of the present application is shown, Figure 3 the principle schematic diagram of the drill rod installed on the center frame provided by the embodiment of the present application is shown, Figure 4 the structure schematic diagram of the auxiliary clamping device provided by the embodiment of the present application is shown. As Figures 2 to 4As shown, in the embodiments of the present application, the drill rod processing equipment 200 is used for threading the drill rod 100, and the drill rod 100 is provided with multiple planes in the axial direction, so the drill rod processing equipment 200 comprises:

[0067] an auxiliary clamping device 210, and a lathe body 220 comprising a center stand 221; the auxiliary clamping device 210 is detachably mounted on the center stand 221.

[0068] Specifically, the lathe body 220 provides a stable working platform for performing threading of the drill rod 100. The lathe body 220 is structurally stable and can withstand various forces and vibrations generated during threading, ensuring processing accuracy and workpiece quality.

[0069] The center stand 221 is used to support and position the drill rod 100, ensuring the stability and accuracy of the drill rod 100 during threading. The center stand 221 usually has an adjustable telescopic top rod to accommodate drill rods 100 of different diameters; the center stand 221 is also equipped with bearings and guide rails to reduce friction and wear, improving processing efficiency.

[0070] The auxiliary clamping device 210 is detachably mounted on the center stand 221, and the mounting method can be threaded, buckled or bolted, etc. The threading process includes the following steps:

[0071] First, clamp one end of the auxiliary clamping device 210 with other clamps, and clamp after aligning the center of the outer circle of the auxiliary clamping device 210 with the center of the main shaft of the lathe body 220; among them, the other clamps can be at least one of a variety of clamps such as chuck jaws for clamping, tailstock centers for jacking, pressure plate bolts for pressure mounting, fan-shaped soft jaws for packaging, elastic sleeve supports for supporting, and puller clamps for pulling;

[0072] Secondly, use the telescopic top rod of the center stand 221 to tighten and lock the auxiliary clamping device 210, and move the center stand 221 to the appropriate position;

[0073] Thirdly, pass the drill rod 100 through the above-mentioned other clamps and the auxiliary clamping device 210, and gradually apply clamping force through the handle or nut until the drill rod 100 is fastened on the center stand 221 and the other clamps of the lathe body 220 after aligning the center of the drill rod 100;

[0074] Finally, start the lathe body 220 to thread the drill rod 100.

[0075] The auxiliary clamping device 210 comprises a transition sleeve 211 and multiple bolt fasteners 212; the transition sleeve 211 is used to be sleeved on the drill rod 100; the multiple bolt fasteners 212 are all threadedly connected on the transition sleeve 211, and the multiple bolt fasteners 212 are collectively used to clamp the multiple planes of the drill rod 100.

[0076] Specifically, the auxiliary clamping device 210 is a clamping mechanism specially designed to adapt to the multiple planes on the drill rod 100, which can effectively control the vibration of the slender drill rod 100 during thread turning and improve the machining precision. The auxiliary clamping device 210 is installed on the center rest 221 of the lathe body 220 and is used to firmly fix the drill rod 100 during machining to prevent it from rolling relative to the center rest and ensure that the drill rod is in the center axis position during thread turning.

[0077] The transition sleeve 211 is the main force supporting component of the drill rod machining equipment 200, and the drill rod 100 is coaxial with the inner and outer circles of the transition sleeve 211, which is used to ensure the rigidity of the entire drill rod 100.

[0078] The multiple bolt fasteners 212 are evenly distributed around the drill rod 100 and are threadedly connected to the transition sleeve 211. These bolt fasteners 212 are designed with structures for applying clamping force, such as handles or nuts, etc., which will jointly act on multiple planes of the drill rod 100 when they are tightened, achieving a firm clamping effect. This clamping method not only ensures the stability of the drill rod 100 during thread turning, but also allows adjustment according to the specific shape and size of the drill rod 100 to adapt to different machining needs.

[0079] The drill rod machining equipment provided by the present application comprises a lathe body, a center rest, and an auxiliary clamping device. The center rest is slidably connected to the lathe body, and the auxiliary clamping device is detachably installed on the center rest. The auxiliary clamping device comprises a transition sleeve and multiple bolt fasteners. The transition sleeve is used to be sleeved on the drill rod. The multiple bolt fasteners are threadedly connected to the transition sleeve, and the multiple bolt fasteners are used to clamp multiple planes of the drill rod. The following technical effects are achieved: the drill rod is clamped on the center rest by the auxiliary clamping device, solving the problem of relatively weak rigidity caused by the relatively large length-diameter ratio of the drill rod; the multiple planes of the drill rod are clamped by the multiple bolt fasteners of the auxiliary clamping device, solving the problem of difficulty in maintaining the accurate relative positional relationship between the center rest and the multiple planes of the drill rod; the transition sleeve is clamped by the support point of the center rest, solving the problem of the drill rod being fixed relative to the support point during thread turning machining.

[0080] Figure 5 A side view of the auxiliary clamping device provided by the embodiment of the present application is shown in Figure 6 A sectional view of the auxiliary clamping device provided by the embodiment of the present application is shown in Figure 2 and Figure 6 As shown in a possible design, the multiple bolt fasteners 212 form a cylindrical surface array layout on the transition sleeve 211;

[0081] In the axial direction of the drill rod 100, the cylindrical surface array is composed of at least two rows of bolt fasteners 212;

[0082] In the radial direction of the drill rod 100, the cylindrical array is composed of multiple rows of bolt fasteners 212.

[0083] Specifically, the cylindrical array layout refers to the arrangement of multiple bolt fasteners 212 on the transition sleeve 211 in an orderly and uniform manner, forming a structure similar to a cylindrical surface. This layout ensures that the bolt fasteners 212 can uniformly distribute the clamping force when clamping the drill rod 100, avoiding excessive local clamping force that may cause damage to the drill rod 100 or poor clamping effect.

[0084] The cylindrical array is composed of at least two rows of bolt fasteners 212, which means that in the length direction of the drill rod 100, the bolt fasteners 212 are divided into at least two groups, each arranged along the axis direction of the drill rod 100. This design is to ensure that the drill rod 100 obtains uniform clamping force and prevents the drill rod 100 from bending or deforming during processing. At the same time, the design of at least two rows also increases the redundancy of clamping, so that even if a bolt fastener 212 fails or loosens, other bolt fasteners 212 can still provide sufficient clamping force to ensure the smooth progress of the processing process.

[0085] The cylindrical array is composed of multiple rows of bolt fasteners 212, which means that in the cross section of the drill rod 100, the bolt fasteners 212 are divided into multiple annular arrays, each arranged along the radial direction of the drill rod 100. This design is to ensure that when the drill rod 100 has multiple planes, uniform clamping force can be obtained. It should be noted that the number of columns of the cylindrical array can be less than, equal to, or greater than the number of multiple planes.

[0086] The technical effect of the embodiments of the present application is to form a cylindrical array layout with multiple bolt fasteners to ensure that the drill rod obtains uniform clamping force.

[0087] In one possible design, the number of columns of the cylindrical array is the same as the number of planes of the drill rod 100.

[0088] Specifically, this design is to ensure that the auxiliary clamping device 210 can more effectively clamp each plane of the drill rod 100, and further reduce damage to the drill rod 100 during clamping by uniformly distributing the clamping force.

[0089] In one possible design, the transition sleeve 211 is a hollow cylindrical workpiece.

[0090] Specifically, during clamping, the transition sleeve 211 can serve as a positioning reference for the drill rod 100. By accurately controlling the screw-in length of the bolt fasteners 212, the drill rod 100 can be ensured to be coaxial with the inner and outer circles of the transition sleeve 211.

[0091] In a possible design, each bolt fastener 212 includes an adjusting bolt 2121 and a fastening nut 2122.

[0092] Each adjusting bolt 2121 penetrates through the transition sleeve 211, and the plurality of adjusting bolts 2121 are collectively used for alignment of the drill rod 100. Each fastening nut 2122 is used for locking the corresponding adjusting bolt 2121.

[0093] Specifically, the adjusting bolt 2121 is used for alignment of the axis of the drill rod 100, and installation and disassembly of the drill rod 100. The fastening nut 2122 cooperates with the adjusting bolt 2121 respectively, and is used for locking of each adjusting bolt 2121 after alignment.

[0094] For example, the number of planes of the drill rod 100 is six, and the number of bolt fasteners 212 is twelve. The cylindrical surface array is composed of two rows of bolt fasteners 212 and six columns of bolt fasteners 212.

[0095] In a possible design, each fastening nut 2122 is arranged on the outer surface of the transition sleeve 211.

[0096] Specifically, the fastening nut 2122 arranged on the outer surface is easier to rotate and lock from the outside without disassembling the transition sleeve 211 or moving other components.

[0097] In a possible design, the center frame 221 includes a multi-prong telescopic ejector rod 2211.

[0098] The multi-prong telescopic ejector rod 2211 is used for clamping the transition sleeve 211.

[0099] Specifically, the multi-prong telescopic ejector rod 2211 extends from the inner surface of the center frame 221 and extends in the direction of the axis of the center frame 221, and is used for clamping the outer cylindrical surface of the transition sleeve 211. These structures are relatively simple, and are convenient and flexible to install and disassemble, and can realize repeated recycling.

[0100] In a possible design, the lathe body 220 further includes a sliding guide rail 222 and a threaded turning tool assembly 223.

[0101] The center frame 221

[0102] Further includes a first sliding block 2212, and the threaded turning tool assembly 223 further includes a second sliding block 2231.

[0103] The sliding guide rail 222 is provided with a limiting block 2221, and the first sliding block 2212 and the second sliding block 2231 are located on two sides of the limiting block 2221 respectively.

[0104] The position of the limiting block 2221 on the sliding guide rail 222 is determined according to the thread length of the drill rod 100.

[0105] Specifically, the thread turning tool assembly 223 includes a thread turning tool and a second sliding block 2231, wherein the thread turning tool is used for thread turning of the drill rod. The center frame 221 slides on the sliding guide rail 222 through the first sliding block 2212, and the thread turning tool assembly 223 slides on the sliding guide rail 222 through the second sliding block 2231. The limiting block 2221 is used to limit the movement range of the thread turning tool assembly 223, and the position of the limiting block 2221 on the sliding guide rail 222 is determined according to the thread length of the drill rod 100, so as to ensure that the thread turning tool assembly 223 does not exceed the predetermined machining area during thread turning.

[0106] In a possible design, the target end of the drill rod 100 is pre-machined with an outer cylinder and a central hole coaxial with the outer cylinder;

[0107] The lathe body 220 further includes a chuck jaw 224 and a tailstock center 225.

[0108] The chuck jaw 224 is used to clamp the outer contour of the drill rod 100, and the tailstock center 225 is used to tightly press the central hole of the drill rod 100.

[0109] Specifically, the target end of the drill rod 100 is pre-machined with an outer cylinder, which is a step on the drill rod 100, and the diameter of the outer cylinder is usually smaller than that of the drill rod segment at the thread turning position. The outer cylinder is pre-machined with a central hole coaxial with the outer cylinder, and the central hole of the target end of the drill rod 100 is tightly pressed by the tailstock center 225. The target end is any one of the two ends of the drill rod 100.

[0110] The other end of the drill rod 100 passes through the chuck jaw 224, and the outer contour of the drill rod 100 at a certain length from the other end is clamped by the chuck jaw 224. The chuck jaw 224 can clamp the flat surface of the drill rod 100 or the outer cylindrical surface of the drill rod 100. The lathe body 220 ensures the stability and precision of the drill rod 100 during machining through the clamping mode of one clamping, one pressing and one supporting.

[0111] In a possible design, the lathe further includes a fence.

[0112] The fence is detachably installed on the lathe body 220.

[0113] Specifically, the fence is used to enclose the drill rod 100 suspended outside the lathe body 220, so as to prevent accidental swinging of the workpiece and ensure safety during machining.

[0114] Figure 7 The flowchart of the drill rod machining method provided in the embodiments of the present application is shown in FIG. 2.Figure 7 The drill rod processing method comprises the following steps:

[0115] S101, milling an end face and boring an outer circle at a target end of the drill rod.

[0116] Specifically, after the drill rod is clamped on the boring-milling machine, the target end face is milled and the outer circle is bored according to the corresponding design drawing, and the outer circle is used as a reference for the subsequent thread cutting process.

[0117] S102, drilling a center hole at the target end of the drill rod.

[0118] Specifically, the center hole is drilled at the target end face on the boring-milling machine to facilitate the subsequent processing of clamping, supporting and strutting with the center hole.

[0119] S103, thread cutting processing of the drill rod.

[0120] Specifically, the thread is cut on the drill rod, and S103 comprises:

[0121] S1031, twelve adjusting bolts and twelve fastening nuts are respectively pre-installed on the transition sleeve;

[0122] S1032, the outer circle of the transition sleeve is clamped by the chuck jaws, and the outer circle of the transition sleeve is aligned to ensure that the outer diameter runout value of the transition sleeve is less than a preset first runout value;

[0123] S1033, the transition sleeve is fixed, and the center frame is moved to the transition sleeve;

[0124] S1034, the outer circle of the transition sleeve is clamped and locked by the multi-jaw telescopic top rod of the center frame;

[0125] S1035, the center frame clamping the transition sleeve is moved to a suitable position, for example, two-thirds of the drill rod, along the sliding guide rail;

[0126] S1036, the drill rod is inserted from the tail end of the lathe body and sequentially passes through the chuck jaws and the inner cavity of the transition sleeve clamped by the center frame, until the center hole of the target end of the drill rod is tightly topped by the tailstock center, and the chuck jaws pre-clamp the outer contour of the other end of the drill rod.

[0127] S1037, the position of the drill rod axis is adjusted by adjusting the twelve adjusting bolts to ensure that the outer diameter runout value of the target end of the drill rod is less than a preset second runout value, and all adjusting bolts and fastening nuts are locked to ensure the accuracy of thread cutting at the target end.

[0128] S1038, the drill rod suspended outside the lathe body is enclosed by the fence, and thread cutting is started.

[0129] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drill rod machining apparatus characterized by comprising: The drill rod processing equipment (200) is used for thread turning of a drill rod (100), a plurality of planes are arranged in the axial direction of the drill rod (100), and the drill rod processing equipment (200) comprises: An auxiliary clamping device (210) and a lathe body (220) comprising a center frame (221); the auxiliary clamping device (210) is detachably mounted on the center frame (221); The auxiliary clamping device (210) comprises a transition sleeve (211) and a plurality of bolt fasteners (212); the transition sleeve (211) is used for sleeving on the drill rod (100); the plurality of bolt fasteners (212) are threadedly connected on the transition sleeve (211), and the plurality of bolt fasteners (212) are used for clamping the plurality of planes of the drill rod (100) together.

2. The drill rod machining apparatus according to claim 1, characterized by, The plurality of bolt fasteners (212) form a cylindrical surface array on the transition sleeve (211); In the axial direction of the drill rod (100), the cylindrical surface array is composed of at least two rows of bolt fasteners (212); In the radial direction of the drill rod (100), the cylindrical surface array is composed of a plurality of columns of bolt fasteners (212).

3. The drill rod machining apparatus of claim 2, wherein, The number of columns of the cylindrical surface array is the same as the number of planes of the drill rod (100).

4. The drill rod machining apparatus according to any one of claims 1 to 3, characterized by, The transition sleeve (211) is a hollow cylindrical workpiece.

5. The drill rod machining apparatus of claim 4, wherein, Each bolt fastener (212) comprises an adjusting bolt (2121) and a fastening nut (2122); Each adjusting bolt (2121) penetrates through the transition sleeve (211), and a plurality of adjusting bolts (2121) are used for aligning the drill rod (100) together; each fastening nut (2122) is used for locking the corresponding adjusting bolt (2121).

6. The drill rod machining apparatus of claim 5 wherein, Each fastening nut (2122) is arranged on the outer surface of the transition sleeve (211).

7. The drill rod machining apparatus of claim 5 wherein, The center frame (221) comprises a multi-claw telescopic jack (2211). The multi-claw telescopic jack (2211) is used for clamping the transition sleeve (211).

8. The drill rod machining apparatus of claim 1 wherein, The lathe body (220) further comprises a sliding guide rail (222) and a threaded turning tool assembly (223); The center frame (221) further comprises a first sliding block (2212), and the threaded turning tool assembly (223) further comprises a second sliding block (2231); A limiting block (2221) is arranged on the sliding guide rail (222), and the first sliding block (2212) and the second sliding block (2231) are located on the two sides of the limiting block (2221) respectively; The position of the limiting block (2221) on the sliding guide rail (222) is determined according to the thread turning length of the drill rod (100).

9. The drill rod machining apparatus of claim 1 wherein, The target end of the drill rod (100) is pre-processed with an outer cylinder and a center hole coaxial with the outer cylinder; The lathe body (220) further comprises a chuck jaw (224) and a tailstock center (225); The chuck jaw (224) is used for clamping the outer contour of the drill rod (100), and the tailstock center (225) is used for tightly pressing the center hole of the drill rod (100).

10. The drill rod machining apparatus of claim 1 wherein, Further comprising: Fence; The fence is detachably installed on the lathe body (220).

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