A cutting tool for machining a door lock cylinder
By designing the cutting holes and positioning components of the cutting fixture, the problem of dimensional deviation in the lock cylinder sleeve was solved, achieving efficient and precise mechanical cutting and improving the machining quality and consistency of the lock cylinder sleeve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUZHOU KANGXIN PRECISION HARDWARE CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing technology, plastic lock cylinder sleeves have dimensional deviations after injection molding. Manual polishing is cumbersome, inefficient, and difficult to control in terms of precision, which affects the product qualification rate.
Using a cutting fixture, the lock cylinder sleeve is mechanically cut by the cutting edge of the cutting hole. Combined with the design of the positioning component and guide post, the precise positioning and stability of the lock cylinder sleeve are ensured, and the excess size is removed in a standardized manner.
It improves the processing efficiency and precision of lock cylinder sleeves, ensures dimensional consistency, and significantly increases the product qualification rate.
Smart Images
Figure CN224525738U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of door lock cylinder processing technology, and in particular to a cutting tool for door lock cylinder processing. Background Technology
[0002] The lock cylinder is the core component of a door lock. Currently, most lock cylinders on the market are made of plastic, and their structure mainly consists of an internal metal cylinder and a plastic cylinder sleeve covering the metal cylinder. This plastic cylinder sleeve is usually manufactured using injection molding. However, due to the inherent characteristics of plastic materials, such as shrinkage and deformation after injection molding, the molded plastic lock cylinder sleeve often has problems with local dimensions exceeding the design tolerance (i.e., the size is too large).
[0003] To address the aforementioned dimensional deviation issue, current technologies generally rely on manual labor using tools such as files to grind and adjust the oversized portions of the plastic lock cylinder sleeve. This manual grinding method has two main drawbacks: First, it is cumbersome and time-consuming: the grinding process is manual, involves numerous steps, and has low production efficiency; second, the processing precision is difficult to control: affected by the operator's skill level and subjective factors, the dimensional accuracy and consistency of the grinding are difficult to guarantee, which can easily lead to a lower product qualification rate and affect subsequent assembly. Utility Model Content
[0004] To address the problems associated with manual grinding of lock cylinder sleeves, this application provides a cutting tool for processing door lock cylinders.
[0005] This application provides a cutting fixture for machining door lock cylinders, employing the following technical solution: A cutting fixture for machining a door lock cylinder includes a base; a cutting plate horizontally disposed above the base, with several support columns fixedly connected to the base for supporting the cutting plate; and a sliding seat parallel to the cutting plate and slidably connected between the base and the cutting plate, the sliding seat having a positioning element for axially positioning the lock cylinder sleeve; wherein, the cutting plate has a cutting hole, the diameter of which matches the outer diameter of the lock cylinder sleeve, allowing the lock cylinder sleeve to pass through axially; the edge of the cutting hole forms a cutting edge, and when the lock cylinder sleeve passes through the cutting hole, the cutting edge contacts and removes the excess outer circumference of the lock cylinder sleeve.
[0006] By adopting the above technical solution, the lock cylinder sleeve is mechanically cut by the cutting edge of the cutting hole, replacing manual filing and improving processing efficiency; in addition, the diameter of the cutting hole matches the outer diameter of the lock cylinder sleeve, ensuring consistent cutting dimensions and avoiding human error.
[0007] Optionally, the positioning element includes at least two positioning plates that are circumferentially and equally spaced on the sliding seat, and a positioning cavity is formed between the positioning plates for axial placement of the lock cylinder sleeve; the cutting plate has an opening for the positioning plates to pass through.
[0008] By adopting the above technical solution, a stable and reliable axial positioning is provided for the lock cylinder sleeve. The positioning cavity provides space for the lock cylinder sleeve, and the opening on the cutting plate allows the positioning plate to pass through, enabling the positioning component to work in conjunction with the cutting plate to accurately position the lock cylinder sleeve and ensure the accuracy of the cutting.
[0009] Optionally, the upper end of the positioning plate is chamfered.
[0010] By adopting the above technical solution, the axial insertion of the lock cylinder sleeve is facilitated.
[0011] Optionally, a positioning seat is fixed on the sliding seat, the positioning seat is located in the positioning cavity, and the positioning seat has a positioning groove for inserting the lock cylinder sleeve.
[0012] By adopting the above technical solutions, the positioning accuracy and stability of the lock cylinder sleeve during the processing have been further improved.
[0013] Optionally, a plurality of first guide posts are fixed on the sliding seat, and a first guide hole matching the first guide post is provided on the cutting plate.
[0014] By adopting the above technical solution, the vertical feed accuracy is ensured: the cooperation between the first guide post and the guide hole constrains the movement trajectory of the sliding seat and avoids scraping angle deviation.
[0015] Optionally, the sliding seat includes an upper plate, a lower plate, and bolts for fixing the two. One end of the first guide post is fixed with a clamping block. The upper plate is provided with a through hole for the first guide post to pass through, and the side of the upper plate facing the lower plate is provided with a clamping groove that matches the clamping block.
[0016] By adopting the above technical solution, the upper and lower plates are connected by bolts, which facilitates disassembly and maintenance.
[0017] Optionally, a plurality of vertically extending second guide posts are fixed on the base, and the sliding seat and the cutting plate are provided with second guide holes that match the second guide posts.
[0018] By adopting the above technical solution, the second guide post penetrates the sliding seat and the cutting plate, ensuring the synchronization accuracy of the multi-layer structure in the vertical direction.
[0019] In summary, this application has the following beneficial effects: The rigid structure of the cutting hole and cutting edge enables one-time, standardized removal of excess dimensions during the axial movement of the lock cylinder sleeve. Compared with manual grinding, this significantly improves the correction accuracy and stability, ensures the consistency of the lock cylinder sleeve dimensions, and thus greatly improves the product qualification rate. Attached Figure Description
[0020] Figure 1This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is an exploded view of an embodiment of this application; Figure 3 This is a schematic diagram of the lock cylinder sleeve in an embodiment of this application; Figure 4 This is a schematic diagram of the sliding seat in an embodiment of this application; Figure 5 This is an exploded view of the sliding seat in an embodiment of this application; Figure 6 This is an exploded view of the base and cutting plate in an embodiment of this application; Figure 7 This is a front view of an embodiment of this application.
[0021] Explanation of reference numerals in the attached drawings: 1. Base; 2. Cutting plate; 3. Cutting hole; 4. Lock cylinder sleeve; 5. Sliding seat; 6. Support column; 7. Positioning component; 8. Positioning plate; 9. Positioning cavity; 10. Opening; 11. Positioning seat; 12. Positioning groove; 13. First guide column; 14. First guide hole; 15. Upper plate; 16. Lower plate; 18. Clamping block; 19. Through hole; 20. Clamping groove; 21. Second guide column; 22. Second guide hole; 25. Column hole. Detailed Implementation
[0022] The present application will be further described in detail below with reference to the accompanying drawings.
[0023] This application discloses a cutting fixture for machining door lock cylinders. (Refer to...) Figure 1 , 2 The cutting fixture includes a base 1, a cutting plate 2, and a sliding seat 5. Several support columns 6 are vertically fixed to the upper surface of the base 1 by bolts. Preferably, there are 4 support columns 6, which are evenly distributed along the four corners of the base 1. Their top ends are fixed to the lower surface of the cutting plate 2 by bolts, thereby horizontally supporting the cutting plate 2 above the base 1 and forming a certain vertical distance between the cutting plate 2 and the base 1 to reserve space for the vertical sliding of the sliding seat 5.
[0024] Reference Figure 2 , 3 The cutting plate 2 is horizontally positioned above the base 1. A cutting hole 3 is formed at the center of the cutting plate 2. The diameter of the cutting hole 3 matches the designed outer diameter of the lock cylinder sleeve 4, and its specific dimensions are determined according to the specifications of the lock cylinder sleeve 4, ensuring that the lock cylinder sleeve 4 can pass axially through the cutting hole 3. The edge of the cutting hole 3 forms a cutting edge for cutting off the excess portion of the lock cylinder sleeve 4. When the lock cylinder sleeve 4 passes through the cutting hole 3, the cutting edge can contact the excess size portion on the outer periphery of the lock cylinder sleeve 4 and remove it in one go, thereby achieving standardized cutting of the lock cylinder sleeve 4, replacing the traditional manual filing method, and significantly improving processing efficiency and accuracy.
[0025] Reference Figure 1 The sliding seat 5 is located between the base 1 and the cutting plate 2, and is parallel to both of them, with the two being connected in a sliding relationship. Specifically, the sliding seat 5 has a column hole 25 for the support column 6 to pass through, which serves to guide the sliding seat 5.
[0026] Reference Figure 1 , 2 The sliding base 5 is equipped with a positioning element 7 to ensure the positional accuracy and stability of the lock cylinder sleeve 4 during processing. The positioning element 7 consists of at least two circumferentially equidistant positioning plates 8 fixed to the sliding base 5, preferably four, and is bolted to the sliding base 5. These positioning plates 8 together form a positioning cavity 9, in which the lock cylinder sleeve 4 can be axially placed. The shape and size of the positioning cavity 9 are adapted to the outer shape of the lock cylinder sleeve 4, thus providing support and positioning for the lock cylinder sleeve 4. To facilitate the axial insertion of the lock cylinder sleeve 4, the upper end of the positioning plate 8 is chamfered.
[0027] The cutting plate 2 has an opening 10 for the positioning plate 8 to pass through, so that the positioning plate 8 can pass through the cutting plate 2 and connect with the sliding seat 5, realizing the coordinated work of the positioning component 7 and the cutting plate 2, and further improving the positioning accuracy and stability of the lock cylinder sleeve 4.
[0028] Reference Figure 4 , 5 A positioning seat 11 is also fixed on the sliding seat 5. The positioning seat 11 is located in the positioning cavity 9 and has a positioning groove 12. The shape and size of the positioning groove 12 match the bottom of the lock cylinder sleeve 4. When the lock cylinder sleeve 4 is placed into the positioning cavity 9, it corresponds to and fits into the positioning groove 12, forming a rotation limit for the lock cylinder sleeve 4. When the sliding seat 5 slides upward to fit against the cutting plate 2, the positioning seat 11 passes through the cutting hole 3, and one end of the positioning seat 11 is basically flat with or slightly higher than the upper surface of the cutting plate 2, which facilitates the positioning and processing of the lock cylinder sleeve 4.
[0029] Reference Figure 2 , 4 A plurality of first guide posts 13 are fixed on the sliding seat 5. In this embodiment, four first guide posts 13 are preferably provided and distributed in a rectangular shape on the sliding seat 5. The cutting plate 2 has first guide holes 14 that match the first guide posts 13. The cooperation between the first guide posts 13 and the first guide holes 14 ensures that the sliding seat 5 remains perpendicular to the cutting plate 2 during its up-and-down sliding process. (Refer to...) Figure 7 After the lock cylinder sleeve 4 is installed and positioned in the positioning groove 12 of the positioning seat 11, the upper surface of the lock cylinder sleeve 4 is at the same horizontal height as the first guide post 13.
[0030] ReferenceFigure 4 , 5 Furthermore, the sliding seat 5 consists of an upper plate 15, a lower plate 16, and bolts connecting the two. A clamping block 18 is fixed to one end of the first guide post 13, and the clamping block 18 is welded to the first guide post 13. The upper plate 15 has a through hole 19 for the first guide post 13 to pass through, and a clamping groove 20 matching the clamping block 18 is opened on the side of the upper plate 15 facing the lower plate 16. When the first guide post 13 passes through the through hole 19, the clamping block 18 can be embedded in the clamping groove 20, and then the clamping block 18 is pressed into the clamping groove 20 by the bolt connection between the upper plate 15 and the lower plate 16, thus firmly fixing the first guide post 13 to the sliding seat 5. When it is necessary to install or remove and replace the first guide post 13 inside the sliding seat 5, simply loosen the bolts to separate the upper plate 15 and the lower plate 16 for related operations.
[0031] Reference Figure 5 , 6 The base 1 is also fixed with several vertically extending second guide posts 21. In this embodiment, four second guide posts 21 are preferably provided and evenly distributed along the edge of the base 1. Both the sliding seat 5 and the cutting plate 2 are provided with second guide holes 22 that match the second guide posts 21. The cooperation between the second guide posts 21 and the second guide holes 22 further ensures the positional accuracy of the sliding seat 5 and the cutting plate 2 in the vertical direction, avoiding the impact of relative offset between components on the cutting effect. Furthermore, the four first guide posts 13 and the four second guide posts 21 are distributed in a rectangular shape on the projection plane.
[0032] The second guide hole 22 on the cutting plate 2 can provide a limit for one end of the second guide post 21, thereby improving the stability of the second guide post 21.
[0033] The implementation principle of a cutting fixture for machining a door lock cylinder according to an embodiment of this application is as follows: First, the base 1 is installed on hydraulic equipment such as a hydraulic press, and the sliding seat 5 is moved upward to its initial position where it fits against the cutting plate 2. The operator axially inserts the lock cylinder sleeve 4 to be processed into the positioning cavity 9 formed by the positioning plate 8 on the sliding seat 5, and inserts the end of the lock cylinder sleeve 4 into the positioning groove 12 of the positioning seat 11, thus completing the positioning and installation of the lock cylinder sleeve 4. Then, the pressure plate of the hydraulic equipment such as the hydraulic press pushes the lock cylinder sleeve 4 and the first guide post 13 downward. Under the combined guiding action of the first guide post 13 and the first guide hole 14, and the second guide post 21 and the second guide hole 22, the sliding seat 5 drives the lock cylinder sleeve 4 to move precisely towards the cutting plate 2.
[0034] When the lock cylinder sleeve 4 contacts the cutting hole 3 on the cutting plate 2, as the sliding seat 5 continues to move downward, the lock cylinder sleeve 4 gradually passes through the cutting hole 3. At this time, the cutting edge of the cutting hole 3 contacts the excess size of the outer periphery of the lock cylinder sleeve 4 and cuts it off. After the lock cylinder sleeve 4 has completely passed through the cutting hole 3, the sliding seat 5 is driven to slide upward and reset. The operator then removes the finished lock cylinder sleeve 4 from the positioning cavity 9, and the next lock cylinder sleeve 4 can be processed.
[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A cutting fixture for machining a door lock cylinder, characterized in that: include: Base (1); A cutting plate (2) is horizontally positioned above a base (1), and several support columns (6) for supporting the cutting plate (2) are fixedly connected to the base (1). The sliding seat (5) is parallel to the cutting plate (2) and is slidably connected between the base (1) and the cutting plate (2). The sliding seat (5) is provided with a positioning element (7) for axially positioning the lock cylinder sleeve (4). The cutting plate (2) has a cutting hole (3) with a diameter matching the outer diameter of the lock cylinder sleeve (4) so that the lock cylinder sleeve (4) can pass through axially. The edge of the cutting hole (3) forms a cutting edge. When the lock cylinder sleeve (4) passes through the cutting hole (3), the cutting edge contacts and cuts off the excess size of the outer periphery of the lock cylinder sleeve (4).
2. The cutting fixture for machining a door lock cylinder according to claim 1, characterized in that: The positioning component (7) includes at least two positioning plates (8) fixed at equal intervals around the sliding seat (5), and a positioning cavity (9) is formed between the positioning plates (8) for the lock cylinder sleeve (4) to be placed axially; the cutting plate (2) has an opening (10) for the positioning plates (8) to pass through.
3. The cutting fixture for machining a door lock cylinder according to claim 2, characterized in that: The upper end of the positioning plate (8) is chamfered.
4. The cutting fixture for machining a door lock cylinder according to claim 2, characterized in that: A positioning seat (11) is fixed on the sliding seat (5). The positioning seat (11) is located in the positioning cavity (9). The positioning seat (11) has a positioning groove (12) for the lock cylinder sleeve (4) to be inserted.
5. The cutting fixture for machining a door lock cylinder according to claim 1, characterized in that: The sliding seat (5) is fixed with a number of first guide posts (13), and the cutting plate (2) is provided with first guide holes (14) that match the first guide posts (13).
6. The cutting fixture for machining a door lock cylinder according to claim 5, characterized in that: The sliding seat (5) includes an upper plate (15), a lower plate (16) and bolts for fixing the two. One end of the first guide post (13) is fixed with a clamping block (18). The upper plate (15) is provided with a through hole (19) for the first guide post (13) to pass through. The upper plate (15) has a clamping groove (20) that matches the clamping block (18) on the side facing the lower plate (16).
7. The cutting fixture for machining a door lock cylinder according to claim 1, characterized in that: The base (1) is fixed with several vertically extending second guide posts (21), and the sliding seat (5) and the cutting plate (2) are both provided with second guide holes (22) that match the second guide posts (21).