A new machine tool chuck connector

Abstract

The present application relates to chuck technical field, specifically be a kind of new lathe chuck connector.It includes connector main body, high-strength meshing structure is symmetrically arranged in the top of connector main body, the side of connector main body is provided with heat dissipation chip removal hole, the two sides of connector main body are provided with several scale line marks, the top of connector main body is also provided with a pair of reference positioning slot corresponding to chuck piece bottom positioning block, the tail of connector main body is provided with pull rod threaded hole.90 ° symmetrical V-shaped meshing tooth is arranged, and tooth root fillet transition is matched, can effectively disperse the tooth root stress of heavy load clamping, greatly reduce stress concentration coefficient, avoid the fatigue crack and tooth collapse risk of traditional right-angle tooth, V-shaped slope meshing can realize the automatic centering of chuck bottom tooth, eliminate radial play clearance, steel pipe clamping radial runout accuracy is significantly improved, effectively reduce threaded eccentric buckling, sealing surface damage and other scrap problems, guarantee the machining quality and coaxial stability of special buckling thread.

Description

Technical Field

[0001] This invention relates to the field of chuck technology, specifically a novel machine tool chuck connector. Background Technology

[0002] In the hydraulic chuck of a CNC threading machine for special steel pipe threads, the jaw connector is the core transition component for transmitting hydraulic tie rod loads and driving the opening and closing of the clamping jaws.

[0003] Existing claw connectors generally have limited compatibility with a single specification, requiring complete disassembly and assembly and cumbersome calibration when changing production; conventional right-angled trapezoidal teeth suffer from stress concentration, making them prone to chipping and wear under heavy loads; solid structures lack chip removal and heat dissipation channels, leading to increased wear due to metal shavings and high temperatures; single-end-face positioning has poor repeatability, and small markings on the end face are easily covered by metal shavings, resulting in misassembly, which seriously restricts the processing efficiency and thread accuracy of oil sleeves and increases tooling costs and safety hazards. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of the existing technology by providing a novel machine tool chuck connector with a reasonable design, which can solve the aforementioned defects.

[0005] To achieve the above objectives, the present invention provides the following technical solution: it includes a connector body, high-strength meshing structures are symmetrically arranged on both sides of the top of the connector body, heat dissipation and chip removal holes are opened on the side of the connector body, several scale lines are opened on both sides of the connector body, a pair of reference positioning grooves corresponding to the bottom positioning blocks of the claw parts are also opened on the top of the connector body, and a pull rod threaded hole is provided at the tail of the connector body.

[0006] Preferably, the connector body is made of 40Cr alloy structural steel, with a quenching and tempering treatment of HB240~28.

[0007] Preferably, the high-strength meshing structure includes a row of several meshing teeth, each meshing tooth having a 90° angle between the inclined planes on both sides, and the angle between two adjacent meshing teeth is also 90°, with the tooth roots between two adjacent meshing teeth being rounded.

[0008] Preferably, the several scale markings correspond to the specifications of several oil casings on the market, and each scale marking is set below the corresponding meshing tooth position.

[0009] Preferably, the surface roughness of the mating surface of the meshing teeth, the reference positioning groove, and the inner surface of the threaded hole of the tie rod is Ra1.6, and the surface roughness of the remaining non-mating surfaces is 12.5.

[0010] Preferably, a row of claw-shaped connecting screw holes is provided on the top of the connector body, and the claw-shaped connecting screw holes are located between two reference positioning grooves.

[0011] The beneficial effects of the invention after adopting the above structure are: 1. This invention, by setting 90° symmetrical V-shaped meshing teeth with rounded tooth root transitions, can effectively disperse the tooth root stress under heavy-duty clamping, significantly reduce the stress concentration coefficient, avoid the fatigue cracks and tooth breakage risks of traditional right-angle teeth, and achieve automatic centering of the bottom teeth of the chuck by the V-shaped inclined surface meshing, eliminating radial runout gaps. Combined with the double limit of the top reference positioning groove, the radial runout accuracy of steel pipe clamping is significantly improved, effectively reducing scrap problems such as thread misalignment and sealing surface damage, and ensuring the processing quality and coaxiality stability of special thread threads.

[0012] 2. This invention provides a through-type heat dissipation and chip removal hole on the side of the connector body. When the chuck rotates, it forms a convection airflow channel, which can quickly remove the cutting heat of the thread cutting, reduce the working temperature of the meshing teeth, delay the wear of the tooth surface caused by high temperature, and the fine iron chips generated during processing can be directly discharged through the chip removal port, avoiding the accumulation of iron chips in the tooth gap and forming abrasive wear. At the same time, the chip removal port removes excess material to reduce weight, reduce the rotational inertia of the chuck, improve the stability of high-speed processing, and increase the overall service life of the connector by more than twice that of the traditional structure.

[0013] 3. This invention features depth scale markings that correspond to mainstream oil casing specifications and match tooth positions. The scale depth is sufficient and not easily obscured by cutting fluid or metal chips. Operators can quickly identify the appropriate gear from a distance, avoiding misinstallation accidents. When changing the processed pipe diameter, simply slide the jaws to the corresponding scale and lock them in place. There is no need to disassemble the connector or repeatedly calibrate the coaxiality. Changeover and debugging time is reduced by more than 70%, making it suitable for the multi-specification batch switching needs of flexible automated production lines. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0015] Explanation of reference numerals in the attached figures: Connector body 1, high-strength meshing structure 2, meshing teeth 20, heat dissipation and chip removal holes 3, scale markings 4, reference positioning groove 5, pull rod threaded hole 6, claw connection screw hole 7. Detailed Implementation

[0016] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0017] like Figure 1 - Figure 3 As shown, this invention proposes a novel machine tool chuck connector, which includes a connector body 1, which is integrally forged from 40Cr alloy structural steel. After quenching and tempering, the hardness is controlled to HB240~280, taking into account structural strength, impact toughness and surface wear resistance, and can be adapted to the alternating load conditions of heavy-duty clamping of oil sleeves. The connector body 1 is an overall elongated block structure that can be embedded in the rectangular guide groove inside the chuck for axial reciprocating sliding. All sharp corners of the outer contour of the body are uniformly machined with 8×45° protective chamfers to eliminate stress concentration sources, avoid cracking along the sharp corners during heat treatment, and improve the safety of assembly operations. High-strength meshing structures 2 are symmetrically arranged on both sides of the top of the connector body 1. Each set of high-strength meshing structures 2 includes a row of continuously arranged meshing teeth 20. The angle between the inclined surfaces of the working surfaces on both sides of a single meshing tooth 20 is 90°, and the angle between the tooth grooves of two adjacent meshing teeth 20 is also 90°, forming a symmetrical 90° V-shaped tooth profile. The tooth root position where adjacent meshing teeth 20 connect adopts a rounded transition structure, which can greatly disperse the tooth root stress under clamping load, avoid tooth root fatigue cracks and tooth breakage failure under heavy load conditions. The 90° V-shaped tooth surface is a beveled fit, which can automatically guide the centering during the assembly of the chuck. There is no radial movement gap after meshing, ensuring the coaxiality accuracy of the steel pipe clamping. The connector body 1 has a heat dissipation and chip removal hole 3 on its side. The heat dissipation and chip removal hole 3 is arranged through the thickness direction of the body. The through chip removal hole can form a convection air channel to quickly remove the cutting heat generated during the thread cutting process, reduce the working temperature of the meshing teeth 20, and delay tooth surface wear. At the same time, the fine iron chips generated during processing can be directly discharged through the heat dissipation and chip removal hole 3, avoiding the accumulation of iron chips in the gap of the meshing teeth 20 to form abrasive wear and extending the overall service life of the connector. Several scale marks 4 are machined on both sides of the connector body 1. The scale marks 4 are arranged sequentially along the length of the body, corresponding to various mainstream oil sleeve specifications on the market. Each scale mark 4 is located directly below the corresponding meshing tooth 20. The scale marks are made with a deep engraving process, which makes them less likely to be covered or obscured by cutting fluid or iron filings. Operators can quickly identify the matching gear from a distance. When changing the machined pipe diameter, it is only necessary to loosen the jaws and slide them along the tooth groove to the corresponding scale position and lock them. There is no need for repeated measurement and calibration, which greatly shortens the production changeover and debugging time. The top of the connector body 1 is also provided with a pair of reference positioning grooves 5. The two reference positioning grooves 5 extend along the length of the body and their positions correspond one-to-one with the positioning blocks at the bottom of the claw. When assembling the claw, the positioning blocks at the bottom of the claw are embedded in the reference positioning grooves 5 to achieve precise guidance and radial limit of the claw, avoid radial displacement of the claw after clamping force, and further ensure clamping coaxiality. The top of the body between the two reference positioning grooves 5 is also provided with a row of claw connecting screw holes 7, which can be used to rigidly fix the claw to the connector body 1 with locking bolts to ensure stable transmission of clamping load. The connector body 1 has a pull rod threaded hole 6 on its tail end face for rigid connection with the hydraulic pull rod of the machine tool chuck, which transmits the axial push and pull load of the pull rod to the jaws to realize the radial opening and closing action of the jaws; the opening of the pull rod threaded hole 6 is machined with a guide chamfer to facilitate the quick screwing of the pull rod thread into the joint and improve assembly efficiency. This device adopts a graded surface roughness design: the mating working surface of the meshing tooth 20, the mating surface of the reference positioning groove 5, and the inner surface of the threaded hole 6 of the tie rod are all precision machined to a surface roughness of Ra1.6 to ensure high-precision fitting and smooth transmission; the remaining non-matting and non-reference surfaces are machined to a surface roughness of Ra12.5, which reduces the finishing time and controls the manufacturing cost of a single piece while meeting the performance requirements.

[0018] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the scope of protection of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A novel machine tool chuck connector, comprising a connector body (1), characterized in that: The connector body (1) has a high-strength meshing structure (2) symmetrically arranged on both sides of the top. The connector body (1) has a heat dissipation and chip removal hole (3) on the side. The connector body (1) has several scale line markings (4) on both sides. The connector body (1) also has a pair of reference positioning grooves (5) corresponding to the bottom positioning block of the claw component on the top. The connector body (1) has a pull rod thread hole (6) at the tail.

2. The novel machine tool chuck connector according to claim 1, characterized in that: The connector body (1) is made of 40Cr alloy structural steel, with quenching and tempering treatment of HB240~28.

3. The novel machine tool chuck connector according to claim 1, characterized in that: The high-strength meshing structure (2) includes a row of several meshing teeth (20), the included angle of the inclined planes on both sides of each meshing tooth (20) is 90°, and the included angle between two adjacent meshing teeth (20) is also 90°, and the tooth root between two adjacent meshing teeth (20) is rounded.

4. A novel machine tool chuck connector according to claim 3, characterized in that: The several scale markings (4) correspond to the specifications of several oil casings on the market, and each scale marking (4) is set below the corresponding meshing tooth (20).

5. A novel machine tool chuck connector according to claim 1, characterized in that: The surface roughness of the mating surface of the meshing tooth (20), the reference positioning groove (5) and the inner surface roughness of the threaded hole (6) of the tie rod are all Ra1.6, and the surface roughness of the other non-mating surfaces is 12.

5.

6. A novel machine tool chuck connector according to claim 1, characterized in that: The connector body (1) has a row of claw connection screw holes (7) on its top, which are located between two reference positioning grooves (5).

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