Automatic grinding control device for medical guide needle blade edge

Abstract

The application provides a kind of medical guide needle blade mouth automatic grinding control device, including automatic turning tool fixture and control assembly;Automatic turning tool fixture includes chassis, horizontal drive plate, first drive mechanism, clamping plate, second drive mechanism, the guide groove is opened in horizontal drive plate, the side surface of clamping plate close to horizontal drive plate is provided with elastic damping layer, and the upper surface of horizontal drive plate is along with being provided with a plurality of placement slots for placing medical guide needles;The control assembly includes controller, detection assembly, and the controller controls the first drive mechanism and the second drive mechanism based on the detection information of detection assembly, can be automatically adjusted according to different specifications of medical guide needle, thereby achieving the purpose of automatic turning and stable grinding.

Description

Technical Field

[0001] This invention relates to the field of grinding machine processing, and more specifically, to an automatic grinding control device for the cutting edge of a medical guide needle. Background Technology

[0002] In existing medical guide pins, the processing requires grinding the edges of both sides. The conventional processing method is as follows: first, the medical guide pin is mounted on a grinding machine using a fixture, and one side is ground. After processing, the operator unlocks the fixture, then manually flips it over and fixes it back in place to grind the other side. This process is repeated until the entire process is completed, at which point the product is removed to process the next product. As can be seen from the above, the current processing efficiency is low, as only one product can be processed at a time. Moreover, the steps are cumbersome, requiring operators to constantly load, flip, and unload the product. Furthermore, because the diameter of the medical guide pin is small, but its use in the medical field requires high precision in its processing, manual flipping is not only inefficient but also results in inaccurate flipping angles, affecting the final product quality.

[0003] In addition, medical guide needles come in different specifications and models, such as those for children, adults, and even the elderly. They include multiple sizes, so their clamps also need to be set up accordingly. When processing different batches of products, the operation of changing the clamps is also required.

[0004] Therefore, it is necessary to improve the existing automatic grinding control device for medical guide needle cutting edges to improve tool changing accuracy. Summary of the Invention

[0005] The main purpose of this application is to provide an automatic grinding control device for the cutting edge of a medical guide needle, which can automatically adjust according to different specifications of medical guide needles to achieve automatic 180° flipping and stable grinding.

[0006] To achieve the above objectives, in a first aspect, this application provides an automatic grinding control device for the cutting edge of a medical guide needle, including an automatic flipping tooling fixture and a control component;

[0007] The automatic flipping fixture includes a fixed base frame, a horizontal drive plate slidably mounted on the base frame in a horizontal direction, a first drive mechanism for driving the horizontal drive plate to slide, a clamping plate slidably mounted above the horizontal drive plate in a vertical direction, and a second drive mechanism for driving the clamping plate to slide vertically. The horizontal drive plate has a guide groove extending in a horizontal direction. The drive end of the second drive mechanism passes through the guide groove and is fixedly connected to the clamping plate. An elastic damping layer is provided on one side of the clamping plate near the horizontal drive plate. The upper surface of the horizontal drive plate has a plurality of placement grooves for placing medical guide needles. The length direction of the placement grooves extends along the width direction of the horizontal drive plate, and the plurality of placement grooves are distributed along the length direction of the horizontal drive plate.

[0008] The control component includes a controller and a detection component for detecting the diameter and gravity of the medical guide needle in the placement slot. Based on the detection information of the detection component, the controller controls the second drive mechanism to apply a first pressure to the horizontal drive plate during the medical guide needle flipping stage and controls the first drive mechanism to drive the horizontal drive plate to slide an optimal distance. During the medical guide needle grinding stage, the controller controls the second drive mechanism to apply a second pressure to the horizontal drive plate.

[0009] Optionally, the optimal travel distance , where d is the diameter of the medical guide needle detected by the detection component.

[0010] Optionally, the first pressure F1 = K1 × (G × r + T) 阻 ) ÷ (μ×r), where K1 is the safety factor, G is the weight of the medical guide needle, r is the radius of the medical guide needle, and T 阻 denoted as , where is the contact resistance torque between the medical guide needle and the elastic damping layer, and μ is the coefficient of friction between the medical guide needle and the elastic damping layer.

[0011] Optionally, the second pressure F2 = K2 × (F3 × L1) ÷ (μ × r), where K2 is the anti-rotation safety factor, F3 is the cutting force of the grinding wheel on the medical guide needle, and L1 is the distance between the contact point between the grinding wheel and the medical guide needle and the edge of the horizontal drive plate.

[0012] Optionally, the base frame includes a base and a support seat disposed on the base. A pad is fixedly disposed on the upper surface of the support seat, and the horizontal drive plate is slidably disposed with respect to the pad.

[0013] Optionally, the support is rotatably mounted on the base, and a locking mechanism is provided between the support and the base to lock them in at least two working positions.

[0014] Optionally, a cylinder mounting base is fixedly provided on the support base, and the first driving mechanism is an electric cylinder connected to the cylinder mounting base, wherein the piston rod of the electric cylinder is connected to the horizontal driving plate.

[0015] Optionally, the second driving mechanism is a plurality of clamping hydraulic cylinders fixedly disposed at the bottom of the support base, wherein the piston rod of the clamping hydraulic cylinder passes through the guide groove and is fixedly connected to the clamping plate.

[0016] Optionally, the elastic damping layer is a rubber layer.

[0017] Optionally, the detection component includes a miniature gravity sensor embedded in the horizontal drive plate and a laser diameter gauge mounted on the base frame.

[0018] The present invention provides an automatic grinding control device for the cutting edge of a medical guide needle. Compared with the prior art, its advantages are as follows: it can complete the processing of guide needles of different specifications and models using the same set of fixtures, avoiding the operation of changing fixtures. In addition, multiple products can be placed on the same fixture for simultaneous grinding during the grinding process, which is more efficient than single-piece processing. Most importantly, for batch-processed guide needles, it can automatically flip 180° during the flipping process, which is not only highly efficient, but also can automatically and accurately control the flipping and clamping force during the flipping and grinding stages based on the automatically detected diameter and weight of the guide needles. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0020] Figure 1 This is a schematic diagram of an automatic flipping tooling fixture. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of an automatic flipping tooling fixture. Figure 2 .

[0022] The components include: 1. base; 2. support seat; 3. pad; 4. horizontal drive plate; 5. clamping plate; 6. elastic damping layer; 7. medical guide needle; 8. electric cylinder; 9. clamping hydraulic cylinder; 10. cylinder mounting seat. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] In addition, the term "multiple" should mean two or more.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-2 As shown, an automatic grinding control device for the cutting edge of a medical guide needle includes an automatic flipping fixture and a control component.

[0030] The automatic flipping fixture includes a fixed base frame, a horizontal drive plate 4 slidably mounted on the base frame in the horizontal direction, a first drive mechanism for driving the horizontal drive plate 4 to slide, a clamping plate 5 slidably mounted above the horizontal drive plate 4 in the vertical direction, and a second drive mechanism for driving the clamping plate 5 to slide vertically. The horizontal drive plate 4 has a guide groove extending in the horizontal direction. The drive end of the second drive mechanism passes through the guide groove and is fixedly connected to the clamping plate 5. An elastic damping layer 6, which is a rubber layer, is provided on one side of the clamping plate 5 near the horizontal drive plate 4. The upper surface of the horizontal drive plate 4 has a plurality of placement grooves for placing medical guide needles 7. The length direction of the placement grooves extends along the width direction of the horizontal drive plate 4, and the plurality of placement grooves are distributed along the length direction of the horizontal drive plate 4.

[0031] The control component includes a controller and a detection component for detecting the diameter and gravity of the medical guide needle 7 in the placement slot. The detection component includes a miniature gravity sensor embedded in the horizontal drive plate 4 and a laser diameter gauge mounted on the base frame. The gravity of the guide needle is detected by the miniature gravity sensor, and the diameter of the guide needle is detected by the laser diameter gauge. It should be noted that since the entire body of the guide needle is not of uniform diameter, the diameter detected here is only the diameter of the part where the grinding surface is located.

[0032] Based on the detection information of the detection component, the controller controls the second drive mechanism during the flipping stage of the medical guide needle 7 so that the clamping plate 5 applies a first pressure to the horizontal drive plate 4 and controls the first drive mechanism to drive the horizontal drive plate 4 to slide an optimal distance. During the grinding stage of the medical guide needle 7, the controller controls the second drive mechanism so that the clamping plate 5 applies a second pressure to the horizontal drive plate 4.

[0033] Specifically, the optimal travel distance Where d is the diameter of the medical guide needle 7 detected by the detection component, and the first pressure F1 = K1 × (G × r + T) 阻 ) ÷ (μ×r), where K1 is the safety factor, usually 1.2-1.5, preferably 1.4, G is the weight of the medical guide pin 7, r is the radius of the medical guide pin 7, and T 阻The contact resistance torque between the medical guide needle 7 and the elastic damping layer 6 is obtained through experimental calibration. For example, the calibration value for a guide needle with a diameter of 2mm is 0.005N·mm. μ is the friction coefficient between the medical guide needle 7 and the elastic damping layer 6. The guide needle is made of stainless steel, while the elastic damping layer 6 is made of rubber. The friction coefficient between stainless steel and rubber is usually 0.4. The second pressure F2 = K2 × (F3 × L1) ÷ (μ × r), where K2 is the anti-rotation safety factor, which is usually 2-4, preferably 3. F3 is the cutting force of the grinding wheel on the medical guide needle 7, which is determined through experimental calibration. For example, the cutting force of a micro grinding wheel is 5-10N, preferably 8N. L1 is the distance between the contact point between the grinding wheel and the medical guide needle 7 and the edge of the horizontal drive plate 4, i.e., the distance between the grinding wheel and the edge of the horizontal drive plate 4. It can be measured after the fixture is installed. It should be noted that the above formula only uses the numerical values ​​of each parameter for calculation and does not include dimensions.

[0034] It should be noted that during the flipping stage, the first pressure applied is mainly used to drive the guide pin to rotate 180° using friction. This pressure is relatively small, just enough to rotate the guide pin, to avoid over-rotation or slippage. At this time, the main force is the driving force of the horizontal drive plate 4 sliding. During the grinding stage, the second pressure applied is mainly used to lock the guide pin using friction to prevent it from rotating. This pressure is relatively large, usually 2-5 times the flipping pressure. At this time, the main force is the cutting force of the grinding wheel.

[0035] Regarding the specific structure of the fixture, the base frame includes a base 1 and a support seat 2 disposed on the base 1. A pad 3 is fixedly disposed on the upper surface of the support seat 2. The horizontal drive plate 4 is slidably disposed with respect to the pad 3. The support seat 2 is rotatably disposed on the base 1. A locking mechanism is also provided between the support seat 2 and the base 1 to lock the two in at least two working positions. The specific structure of the locking mechanism is not the design focus of this invention. Any locking mechanism that can lock two rotating parts in multiple working positions can be used here. The purpose of adjusting the angle between the support seat 2 and the base 1 is to adjust the grinding angle.

[0036] Preferably, a cylinder mounting base 10 is fixedly disposed on the support base 2. The first driving mechanism is an electric cylinder 8 connected to the cylinder mounting base 10. The piston rod of the electric cylinder 8 is connected to the horizontal driving plate 4. The second driving mechanism consists of a plurality of clamping hydraulic cylinders 9 fixedly disposed at the bottom of the support base 2. The piston rod of the clamping hydraulic cylinder 9 passes through the guide groove and is fixedly connected to the clamping plate 5. Figure 1The guide groove shown is an oblong groove, so that when the horizontal drive plate 4 slides, it can provide clearance space for the piston rod of the clamping hydraulic cylinder 9 to prevent motion interference. In addition, it should be noted that the first drive mechanism and the second drive mechanism can also use cylinders in addition to the above structure.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic grinding control device for the cutting edge of a medical guide needle, characterized in that, The automatic turning-over fixture clamp comprises a fixed base, a horizontal driving plate slidingly arranged on the base along a horizontal direction, a first driving mechanism for driving the horizontal driving plate to slide, a clamping plate slidingly arranged above the horizontal driving plate along a plumb direction, and a second driving mechanism for driving the clamping plate to vertically slide. The horizontal driving plate is provided with a guide groove extending along the horizontal direction, and the driving end of the second driving mechanism is fixedly connected with the clamping plate through the guide groove. The control assembly comprises a controller and a detection assembly for detecting the diameter and gravity of the medical guide needle placed in the slot, and the controller controls the second driving mechanism to make the clamping plate exert a first pressure on the horizontal driving plate during the medical guide needle turning stage and controls the first driving mechanism to drive the horizontal driving plate to slide an optimal moving distance based on the detection information of the detection assembly, controls the second driving mechanism to make the clamping plate exert a second pressure on the horizontal driving plate during the medical guide needle grinding stage, and the optimal moving distance wherein d is the diameter of the medical guide needle detected by the detection assembly.

2. The medical guide needle edge automatic grinding control device according to claim 1, wherein: The first pressure F1 = K1 x (G x r + T 阻 ) ÷ (μ x r), wherein K1 is a safety factor, G is the gravity of the medical guide needle, r is the radius of the medical guide needle, T 阻 is the contact resistance moment of the medical guide needle and the elastic damping layer, and μ is the friction coefficient of the medical guide needle and the elastic damping layer.

3. The medical guide needle edge automatic grinding control device according to claim 1, wherein: The upper surface of the horizontal driving plate is provided with a plurality of placement grooves for placing medical guide needles, and the length direction of the placement grooves extends along the width direction of the horizontal driving plate.

4. The medical guide needle edge automatic grinding control device according to claim 1, wherein: The second pressure F2=K2×(F3×L1)÷(μ×r), wherein K2 is a safety coefficient for preventing self-rotation, F3 is a cutting force of the grinding wheel on the medical guide needle, and L1 is a distance between the contact point of the grinding wheel and the medical guide needle and the edge of the horizontal driving plate.

5. The medical guide needle edge automatic grinding control device according to claim 4, characterized in that: The base comprises a base and a support seat arranged on the base.

6. The medical guide needle edge automatic grinding control device according to claim 4, characterized in that: The support seat is rotatably arranged on the base, and a locking mechanism is arranged between the support seat and the base to lock them in at least two working positions.

7. The medical guide needle edge automatic grinding control device according to claim 4, characterized in that: The support seat is fixedly provided with a cylinder mounting seat, and the first driving mechanism is an electric cylinder connected with the cylinder mounting seat.

8. The medical guide needle edge automatic grinding control device according to claim 1, wherein: The second driving mechanism is a plurality of clamping hydraulic cylinders fixedly arranged at the bottom of the support seat, and the piston rods of the clamping hydraulic cylinders are fixedly connected with the clamping plate through the guide groove.

9. The medical guide needle edge automatic grinding control device according to claim 1, wherein: The elastic damping layer is a rubber layer. The detection assembly comprises a micro-gravity sensor embedded in the horizontal driving plate and a laser diameter measuring instrument arranged on the base.

Images