Positioning tool for workpiece drilling machining
By designing a positioning fixture for the base, clamping block, and drill bit guide mechanism, the deformation problem of the drill bit when drilling into the side wall of a tubular workpiece was solved, achieving high-precision drilling and facilitating the replacement of the guide components.
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG INST OF TECH
- Filing Date
- 2025-09-03
- Publication Date
- 2026-07-31
AI Technical Summary
In the prior art, when drilling holes in the sidewall of a tubular workpiece, the drill bit is deformed by pressure on the arc surface, which leads to deviation in the drilling position and makes it difficult to guarantee accuracy.
A positioning fixture comprising a base, a clamping block, an adjusting screw, and a drill bit guiding mechanism is designed. The workpiece is clamped by adjusting the screw, and the drill bit guiding mechanism provides support and guidance to prevent drill bit deformation. The guiding components can be quickly replaced to adapt to different drill bit models.
It improves the accuracy of drilling holes in the sidewalls of tubular workpieces, avoids deformation of the drill bit on the arc surface, and is easy to operate and highly adaptable.
Smart Images
Figure CN224574724U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of positioning tooling technology, specifically to a positioning tooling for workpiece drilling. Background Technology
[0002] Drilling holes in the sidewalls of tubular workpieces is a common machining process. Currently, the workpiece is horizontally fixed to a positioning fixture, and then a drilling machine is used to vertically drill the sidewalls. Because the sidewalls of the tubular workpieces are arc-shaped, the drill bit deforms under pressure on the arc surface during drilling, leading to deviations in the drilling position and making it difficult to guarantee drilling accuracy. Therefore, a positioning fixture for workpiece drilling is needed to solve these problems. Utility Model Content
[0003] The purpose of this utility model is to provide a positioning fixture for workpiece drilling, so as to solve the problems existing in the prior art mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A positioning fixture for drilling workpieces includes a base, clamping blocks, and an adjusting screw. Two clamping blocks are provided and slidably connected to the base for clamping and positioning tubular workpieces.
[0006] An adjusting screw is installed on the base, and the adjusting screw is threadedly connected to the clamping block, which is used to control the two clamping blocks to slide closer or further apart from each other.
[0007] A bracket is mounted on the base, and a drill bit guide mechanism is mounted on the bracket for guiding and supporting the drill bit.
[0008] Preferably, the drill bit guiding mechanism includes a fixed cylinder and a guiding assembly. The fixed cylinder is fixedly connected to the bracket, and the guiding assembly is detachably connected to the fixed cylinder, which facilitates the replacement of the guiding assembly according to different drill bit models.
[0009] Preferably, the guiding assembly includes a support cylinder, a fixed cover, and a guide cylinder. The fixed cover is fixedly connected to the upper end of the support cylinder, and the guide cylinder is provided inside the support cylinder. The upper and lower ends of the guide cylinder are connected to the inner wall of the support cylinder through bearings, and the inner diameter of the guide cylinder matches the diameter of the drill bit.
[0010] Preferably, the upper outer wall of the fixed cylinder is provided with an external thread, and the inner wall of the fixed cover is provided with an internal thread that matches the external thread on the fixed cylinder. The fixed cover is installed on the fixed cylinder by means of the thread.
[0011] Preferably, the bearing is a thrust roller bearing.
[0012] Preferably, the adjusting screw is connected to a dial for indicating the rotation angle.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. This utility model, through the setting of the drill bit guide mechanism, can provide support and guidance for the drill bit, avoid deformation caused by the drill bit pressing down on the arc surface, thereby improving the accuracy of drilling the side wall of tubular workpieces.
[0015] 2. This utility model uses a guide cylinder that can rotate relative to the support cylinder to avoid wear caused by friction between the drill bit and the guide cylinder. Furthermore, the quick-release design between the guide component and the fixed cylinder allows for rapid replacement of the guide component according to the drill bit model, making the operation convenient and quick. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model.
[0018] Figure 3 This is a schematic diagram of the drill bit guiding mechanism of this utility model.
[0019] Figure 4 This is a schematic diagram of the guide component structure of this utility model.
[0020] Figure 5 This is a schematic diagram of the connection structure between the guide cylinder and the bearing of this utility model.
[0021] In the diagram: 1. Base; 2. Clamping block; 3. Adjusting screw; 4. Bracket; 5. Drill bit guide mechanism; 51. Fixed cylinder; 52. Guide assembly; 521. Support cylinder; 522. Fixed cover; 523. Guide cylinder; 524. Bearing; 6. Tubular workpiece; 7. Dial. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] Please see Figure 1-5 The present invention provides the following technical solution:
[0024] A positioning fixture for drilling workpieces includes a base 1, clamping blocks 2, and an adjusting screw 3. Two clamping blocks 2 are provided and slidably connected to the base 1 for clamping and positioning tubular workpieces 6. The adjusting screw 3 is installed on the base 1 and is threadedly connected to the clamping blocks 2 for controlling the two clamping blocks 2 to slide closer or further apart. A scale 7 for indicating the rotation angle is connected to the adjusting screw 3. The position of the clamping blocks 2 can be precisely adjusted and the appropriate clamping force can be adjusted by setting the scale 7.
[0025] A bracket 4 is mounted on the base 1, and a drill bit guide mechanism 5 is mounted on the bracket 4 for guiding and supporting the drill bit. The drill bit guide mechanism 5 includes a fixed cylinder 51 and a guide assembly 52. ββThe fixed cylinder 51 is fixedly connected to the bracket 4, and the guide assembly 52 is detachably connected to the fixed cylinder 51, which facilitates the replacement of the guide assembly 52 according to different models of drill bits.
[0026] The guide assembly 52 includes a support cylinder 521, a fixed cover 522, and a guide cylinder 523. The fixed cover 522 is fixedly connected to the upper end of the support cylinder 521. The guide cylinder 523 is provided inside the support cylinder 521. The upper and lower ends of the guide cylinder 523 are connected to the inner wall of the support cylinder 521 through bearings 524. The bearings 524 are thrust roller bearings. The inner diameter of the guide cylinder 523 matches the diameter of the drill bit, ensuring that the drill bit can enter the guide cylinder 523 and providing support force to the drill bit to prevent deformation of the drill bit. Since a certain axial thrust is generated during the process of the drill bit entering the guide cylinder 523, the use of thrust roller bearings can adapt to this thrust environment.
[0027] The upper outer wall of the fixed cylinder 51 is provided with external threads, and the inner wall of the fixed cover 522 is provided with internal threads that match the external threads on the fixed cylinder 51. The fixed cover 522 is installed on the fixed cylinder 51 by threads. The guide assembly 52 can be installed and removed by rotating the fixed cover 522, which facilitates the quick replacement of different models of guide assemblies 52 according to the drill bit model.
[0028] The working process of this utility model is as follows:
[0029] When drilling is required on the side wall of the tubular workpiece 6, the tubular workpiece 6 is first placed between the two clamping blocks 2. By rotating the adjusting screw 3, the two clamping blocks 2 move closer to each other, thereby achieving the clamping and positioning of the tubular workpiece 6.
[0030] The drill is controlled to move the drill bit directly above the drill bit guide mechanism 5, aligning the axis of the drill bit with the axis of the guide cylinder 523. The drill bit is then moved downwards and enters the guide cylinder 523. The drill is then started to rotate the drill bit, thus drilling the tubular workpiece 6. During this process, the guide cylinder 523 rotates along with the drill bit under the friction force, preventing the drill bit from rubbing against the inner wall of the guide cylinder 523 and causing wear. At the same time, the guide cylinder 523 provides vertical support for the drill bit, preventing deformation and making the drilling position more accurate.
[0031] When it is necessary to change to a different specification of drill bit, the guide assembly 52 can be replaced at the same time. The guide assembly 52 can be removed from the fixed cylinder 51 by rotating the fixed cover 522, and then the corresponding model of guide assembly 52 can be rotated and installed into the fixed cylinder 51, so as to realize the quick replacement of the guide assembly 52.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A positioning fixture for drilling workpieces, characterized in that, It includes a base (1), a clamping block (2) and an adjusting screw (3). The clamping block (2) is provided in two and is slidably connected to the base (1) for clamping and positioning the tubular workpiece (6). An adjusting screw (3) is installed on the base (1). The adjusting screw (3) is threadedly connected to the clamping block (2) to control the two clamping blocks (2) to slide closer or further apart from each other. A bracket (4) is installed on the base (1), and a drill bit guide mechanism (5) is installed on the bracket (4) for guiding and supporting the drill bit.
2. The positioning tooling apparatus of claim 1, wherein: The drill bit guiding mechanism (5) includes a fixed cylinder (51) and a guiding component (52). The fixed cylinder (51) is fixedly connected to the bracket (4), and the guiding component (52) is detachably connected to the fixed cylinder (51), which facilitates the replacement of the guiding component (52) according to different models of drill bits.
3. The positioning tooling apparatus of claim 2, wherein: The guide assembly (52) includes a support cylinder (521), a fixing cover (522), and a guide cylinder (523). The upper end of the support cylinder (521) is fixedly connected to the fixing cover (522). The inside of the support cylinder (521) is provided with a guide cylinder (523). The upper and lower ends of the guide cylinder (523) are connected to the inner wall of the support cylinder (521) through bearings (524). The inner diameter of the guide cylinder (523) matches the diameter of the drill bit.
4. The positioning tooling apparatus of claim 3, wherein: The upper outer wall of the fixed cylinder (51) is provided with an external thread, and the inner wall of the fixed cover (522) is provided with an internal thread that matches the external thread on the fixed cylinder (51). The fixed cover (522) is installed on the fixed cylinder (51) by means of the thread.
5. The positioning tooling apparatus of claim 3, wherein: The bearing (524) is a thrust roller bearing.
6. The positioning tooling apparatus of claim 1, wherein: The adjusting screw (3) is connected to a dial (7) for indicating the rotation angle.