Limiting device for improving drilling machining precision
By designing a limiting device including a limit stop, bearing seat, fixing screw sleeve, adjustment nut and screw, the existing drilling limiter has solved the problem of position error and inability to flexibly adjust the hole diameter or hole distance during use, achieving higher drilling accuracy and consistency.
Patent Information
- Application Number
- CN202420488341.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The existing drilling limiters have position errors during use, and the hole diameter or hole distance cannot be flexibly adjusted, resulting in poor machining accuracy and consistency.
A limiting device including a drill chuck, a reference outer shell and a limiting device is designed. The limiting device consists of a limiting stop, a bearing seat, a fixing screw sleeve, an adjustment nut and a screw. Through the left and right rotation of the bearing seat and the adjustment nut, the distance between the free end of the limiting stop and the contact surface of the tool is slightly adjusted to achieve accurate limiting.
The limiting device can adjust the aperture or hole distance according to needs, significantly improve the accuracy and consistency of drilling and processing, and has a simple structure, quick assembly, low cost, and good versatility.
Smart Images
Figure CN222552263U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a limiting mechanism, in particular to a limiting device for improving drilling processing accuracy, belonging to the technical field of drilling. Background Art
[0002] At present, a stopper should be used to provide accurate positioning for the workpiece before drilling or cutting shaft parts. It can ensure that the drilling or cutting position is accurate, but there are still certain errors during use. For example, a slight position deviation or insufficient clamping of the clamp may lead to positioning errors. Since the working principle of the existing drilling stopper is to provide an accurate hole position limit by fixing it on the workpiece, this will also cause all hole positions to be fixed during processing, and parameters such as the hole diameter or hole distance cannot be flexibly adjusted according to needs, resulting in poor practicality of the current drilling stopper.
[0003] In addition, especially in the processing of shaft parts (such as crankshafts, camshafts, etc.), the position and size of the drilling holes are required to be high, and there are very high consistency requirements. Due to the characteristics of CNC machine tools or special machine tools, the size and position of the drilling holes are easy to guarantee. For example: for general machine tools (lathes) when processing the center hole, ordinary drilling stoppers cannot provide high-precision limit, and the depth and major diameter of the hole cannot be effectively controlled. Corresponding detection tools are required and repeated measurements and processing can achieve the size required by the drawing, and the consistency of the drilling size is poor.
[0004] In view of the characteristics or defects of general machine tools (lathes), it is necessary to design and improve the limiter for drilling or cutting, and a limit device for improving the drilling processing accuracy is proposed to overcome the above defects. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a limit device for improving the drilling processing accuracy, which has a simple structure, quick assembly, versatility, low cost, and higher drilling or cutting processing accuracy.
[0006] In order to solve the above technical problems, the utility model provides a limit device for improving the drilling processing accuracy, including a drill chuck, a tool and a reference outer cylindrical shell are arranged on the drill chuck, and the characteristic is that: a limit device is arranged on the reference outer cylindrical shell, and the limit device includes a limit stop, a bearing seat, a fixed screw sleeve, an adjusting nut and a plurality of screws. The fixed screw sleeve is in the shape of a hollow circular tube, which passes through the reference outer cylindrical shell and is radially fixed by screws. One side of the fixed screw sleeve is connected to the adjusting nut through its thread, and the other side of the fixed screw sleeve is connected to the bearing seat through its thread. The limit stop is partially clamped inside the bearing seat and the clamped part constitutes the closed end of the limit stop, and the unclamped part constitutes the free end of the limit stop; by rotating the bearing seat and the adjusting nut left and right, the bearing seat will drive the limit stop to move synchronously at the same time, so that the bearing seat and the adjusting nut are closely interlocked on the fixed screw sleeve, so that the axial distance between the contact surface of the free end of the limit stop and the protruding end of the tool can be slightly adjusted, thereby improving the drilling processing hole accuracy.
[0007] Furthermore, the cross-section of the limit stop is overall in a "T" shape. In the assembled state: the free end of the limit stop is a "T"-shaped limit stop, and the transverse section of the limit stop is longitudinally arranged, and is outside the bearing seat; the closed end of the limit stop is a "T"-shaped limit stop, and the longitudinal section of the limit stop is transversely arranged, and is clamped with the inner ring of the bearing seat, and a gap is left between the outer ring of the bearing seat and the inner side of the free end of the limit stop. The gap left here ensures the normal operation of the bearing.
[0008] Furthermore, the limit stop block has gradually expanding trumpet-shaped through holes at its center on both sides, and the center of the through hole is the same as the center of the tool working path, so that the tool can quickly discharge the debris embedded in the through hole during drilling to the outside through the expanded trumpet-shaped through holes on both sides.
[0009] Furthermore, the outer ring of the fixed screw sleeve has a thread, and the pitch of the thread is 0.5 mm fine pitch; one end of the bearing seat has a thread, and the inner ring of the adjusting nut has a thread, and the pitch of the two threads is 0.5 mm fine pitch; and the use of 0.5 mm fine pitch thread is more conducive to improving the drilling processing accuracy.
[0010] Furthermore, the fixing screw sleeve and the reference housing are in a clearance fit, and the clearance fit is convenient for adjustment and loading and unloading.
[0011] Furthermore, at least three screws are provided, which are evenly distributed around the circumference of the reference outer shell to ensure the stability of the overall device.
[0012] The beneficial effects of the utility model are as follows: the limit device structure on the drill chuck of the utility model adopts a bearing seat and an adjustment nut to be flexibly adjusted to the left and right, which well solves the problem of accurate drilling or cutting position, and can flexibly adjust parameters such as hole diameter or hole distance according to the required size, greatly improving the drilling hole accuracy. The design of the utility model can give full play to the advantages of flexible limit, is easy to process in production, has a simple assembly and integration process, high quality and precision, and has many versatility. The utility model has a simple structure, low production cost and technical requirements, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.
[0014] Figure 1 The utility model is a structural schematic diagram of a drill chuck.
[0015] Figure 2 It is a cross-sectional schematic diagram of the limit stopper of the utility model.
[0016] Figure 3 It is a cross-sectional schematic diagram of the bearing seat of the utility model.
[0017] Figure 4 It is a cross-sectional schematic diagram of the fixing screw sleeve of the utility model.
[0018] Figure 5 The utility model is a schematic cross-sectional view of the adjusting nut.
[0019] Figure 6 The utility model is an assembly diagram of a drill chuck.
[0020] In the figure: G-workpiece, T-drill chuck, k-reference outer cylindrical shell, 1-limit stopper, 1a-limit stopper closed end, 1b-limit stopper free end, 1c-center through hole, 2-bearing seat, 3-fixing screw sleeve, 4-adjusting nut. DETAILED DESCRIPTION Embodiment 1
[0021] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0022] The first embodiment of the present invention is a limit device for improving drilling processing accuracy, and its structure is as follows: Figure 1-Figure 6 As shown, including a drill chuck T, such as Figure 1 As shown; the drill chuck T has a tool and a reference outer cylindrical shell k, and a limit device is installed on the reference outer cylindrical shell k. The limit device includes a limit stopper 1, a bearing seat 2, a fixed screw sleeve 3, an adjusting nut 4 and a plurality of screws, such as Figure 2 , 3, 4, 5; the fixed screw sleeve 3 penetrates the reference outer cylindrical shell k and is evenly fixed on the circumference of the reference outer cylindrical shell by three screws. One side of the fixed screw sleeve 3 is connected to the adjusting nut 4 through its thread, and the other side of the fixed screw sleeve 3 is connected to the bearing seat 2 through its thread. The inner part of the bearing seat 2 is clamped with the limit stopper 1 and the clamped part constitutes the closed end 1a of the limit stopper, and the free end 1b of the limit stopper is constituted, as shown in FIG. Figure 6 shown.
[0023] This embodiment is combined with Figure 2 , 6 : The cross-section of the limit stop 1 is overall in a "T" shape. In the assembled state: the free end 1b of the limit stop is a "T"-shaped limit stop, and the transverse section is longitudinally arranged, and is outside the bearing seat 2; the closed end 1a of the limit stop is a "T"-shaped limit stop, and the longitudinal section is transversely arranged, and is clamped with the inner ring of the bearing seat 2, and a gap is left between the outer ring of the bearing seat 2 and the inner side of the free end 1b of the limit stop.
[0024] Further, combined with Figure 2 , 6 : The limit block 1 has gradually expanding trumpet-shaped through holes 1c at its center on both sides, and the center of the through hole 1c is the same as the center of the tool working path. This makes it convenient for the tool to quickly discharge the debris embedded in the center through hole 1c during drilling to the outside through the expanded trumpet-shaped through holes on both sides, thereby achieving the purpose of quickly cleaning the debris inside the drill chuck.
[0025] Further, combined with Figure 4 As shown: the fixing screw sleeve 3 is in the shape of a hollow round tube, which is convenient for assembly with the drill chuck T; the outer ring of the fixing screw sleeve 3 has a thread, and the pitch of the thread is 0.5 mm fine pitch; one end of the inner part of the bearing seat 2 has a thread, and the inner ring of the adjusting nut 4 has a thread, and the pitch of the two threads is 0.5 mm fine pitch.
[0026] Implementation of assembly process: Before drilling, first clamp the tool (drill bit, center drill) on the drill chuck T and clamp it, then first pass the fixed screw sleeve 3 through the reference outer shell k and fix it radially with three screws, then connect the adjusting nut 4 to the fixed screw sleeve 3, and then connect the bearing seat 2 of the clamped limit stopper 1 to the fixed screw sleeve 3, so that the limit device is assembled. Figure 6 By rotating the bearing seat 2 and adjusting nut 4 left and right, the bearing seat 2 drives the limit stopper 1 to move synchronously, so that the bearing seat 2 and the adjusting nut 4 are closely interlocked on the fixed screw sleeve 3. Since the limit stopper 1 is moved left and right by the bearing seat 2, the distance changes, which inevitably realizes a slight adjustment of the axial distance between the contact surface of the free end 1b of the limit stopper and the extended end of the tool.
[0027] The device will always be combined with measurement during use. If the measurement finds that the axial dimension is wrong, the bearing seat 2 and the adjusting nut 4 will be adjusted left and right, and a more accurate position will be found in combination with the measurement. For example: in the processing of the first piece or test workpiece G, it is measured that the axial dimension of the drilled hole is large, so the bearing seat 2 and the adjusting nut 4 are adjusted in the direction close to the workpiece G; it is measured that the axial dimension of the drilled hole is small, so the bearing seat 2 and the adjusting nut 4 are adjusted away from the workpiece G. The above process and the measurement can be repeatedly adjusted left and right until the bearing seat 2 and the adjusting nut 4 are in a more accurate position and in a close interlocking state, so that the drilling in the next test workpiece will meet the axial dimension requirements. However, only processing the first piece or test workpiece G according to the above rules and processes will obviously increase the accuracy requirements of the processed parts.
[0028] After the limit device is adjusted according to the above rules, when the limit block 1 in the device reaches the most precise position, it is integrated into the processing of the finished workpiece G. At this time, the limit block 1 fully reflects its working significance. When the test workpiece G or the finished workpiece G that meets the drilling size or parameters is processed, the end face of the test workpiece G or the finished workpiece G contacts the free end contact surface of the limit block 1 and the limit block 1 immediately idles. At this time, the tool drilling stops. At this point, each finished workpiece G will follow the above process after processing. In this way, the purpose of batch processing of finished workpieces G is achieved, the consistency of the processing of batches of finished workpieces G is ensured, and finally the precision of batches of finished workpieces G is improved.
[0029] To sum up, the above is only one of the preferred embodiments of the utility model, and does not constitute any other form of limitation to the utility model. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields, which should be included in the scope of the utility model.
[0030] In addition to the above embodiments, the utility model may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.
Claims
1. A limit device for improving drilling processing accuracy, comprising a drill chuck, a tool and a reference outer cylindrical shell on the drill chuck, characterized in that: A limiting device is arranged on the reference outer cylindrical shell, and the limiting device comprises a limiting stopper, a bearing seat, a fixing screw sleeve, an adjusting nut and a plurality of screws. The fixing screw sleeve is in the shape of a hollow circular tube, which passes through the reference outer cylindrical shell and is radially fixed by screws. One side of the fixing screw sleeve is connected to the adjusting nut through its thread, and the other side of the fixing screw sleeve is connected to the bearing seat through its thread. The limiting stopper is clamped inside the bearing seat, and the clamped part constitutes the closed end of the limiting stopper, and the part without clamping constitutes the free end of the limiting stopper; by rotating the bearing seat and the adjusting nut left and right, the bearing seat drives the limiting stopper to move synchronously, so that the bearing seat and the adjusting nut are closely interlocked on the fixing screw sleeve, so that a slight adjustment of the axial distance between the contact surface of the free end of the limiting stopper and the extended end of the tool is achieved, thereby improving the drilling processing accuracy.
2. A limiting device for improving drilling precision according to claim 1, characterized in that: The cross-section of the limit stop is "T"-shaped as a whole. In the assembled state: the free end of the limit stop is "T"-shaped, the transverse section of the limit stop is longitudinally arranged, and is outside the bearing seat; the closed end of the limit stop is "T"-shaped, the longitudinal section of the limit stop is transversely arranged, and is clamped with the inner ring of the bearing seat, and a gap is left between the outer ring of the bearing seat and the inner side of the free end of the limit stop.
3. A limiting device for improving drilling precision according to claim 2, characterized in that: The limit stopper has a center which is provided with gradually expanding trumpet-shaped through holes on both sides thereof, and the center of the through hole is the same as the center of the tool working path.
4. A limiting device for improving drilling precision according to claim 1, characterized in that: The outer ring of the fixed screw sleeve has a thread, and the pitch of the thread is 0.5 mm fine pitch; one end of the bearing seat has a thread, and the inner ring of the adjusting nut has a thread, and the pitch of the two threads is 0.5 mm fine pitch.
5. The limiting device for improving drilling precision according to claim 1, characterized in that: The fixing screw sleeve and the reference outer cylindrical shell are in clearance fit.
6. The limiting device for improving drilling precision according to claim 1, characterized in that: At least three screws are provided and are evenly distributed around the circumference of the reference outer cylindrical shell.