Cutting feeding device for medical metal needle head machining

Abstract

The invention relates to the technical field of machine tool shearing equipment, and discloses a cutting feeding device for medical metal needle head machining, which comprises a supporting platform, two chains are arranged above the supporting platform, a plurality of linkage plates arranged at equal intervals are fixedly connected between the two chains through elastic connecting devices, and a passive pressing plate is arranged on one side of each linkage plate. The driven pressing plate drives the stainless steel pipe to move towards the cutting knife along with operation of the chain to conduct cutting feeding, the stainless steel pipe is cut through the cutting knife, and the stainless steel pipe cutting device further comprises a material pressing device arranged on the inner side of the linkage plate. The stainless steel pipes are driven by the passive pressing plate to move towards one end of the cutting knife to achieve cutting feeding, and when the cutting knife conducts cutting, the stainless steel pipes to be cut are clamped by the passive pressing plate through magnetic repulsive force generated by electrification of an electromagnet in the material pressing device, so that it is guaranteed that when the cutting knife conducts batch cutting on the stainless steel pipes, the cutting efficiency is improved. And all the passive pressing plates can cover the stainless steel pipe, so that the stainless steel pipe is kept stable.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of machine tool shearing equipment, in particular to a cutting feeding device for medical metal needle head processing. BACKGROUND

[0002] Medical metal needle heads are indispensable and key interventional medical instruments, and a traditional medical metal needle head is usually formed by precisely processing an austenitic stainless steel pipe material with excellent biocompatibility and corrosion resistance. During production of the metal needle head, the stainless steel pipe material is first cut into a single needle pipe blank by a cutting device.

[0003] Since the existing device generally cuts in batches when cutting the stainless steel pipe material in batches, the existing device needs a complex servo feeding mechanism, a precise linear module and multiple pneumatic or servo clamps to feed and clamp the stainless steel pipe material during cutting feeding of the stainless steel pipe material, which results in high manufacturing and maintenance costs. In addition, due to the separate design of the feeding mechanism and the clamping mechanism, the clamping area of the clamp for the stainless steel pipe material is small during cutting feeding and clamping of the stainless steel pipe material, and a sudden impact force is generated during the moment when the cutting knife contacts and cuts into the needle pipe, which causes vibration and affects cutting precision. SUMMARY

[0004] The application provides a cutting feeding device for medical metal needle head processing, which has the advantages of low manufacturing and maintenance costs and high cutting precision, and solves the problems of high cost of the existing cutting feeding device for medical metal needle head processing due to the need for a complex servo feeding mechanism, a precise linear module and multiple pneumatic or servo clamps to feed and clamp the stainless steel pipe material, and the problem of vibration affecting cutting precision due to the small clamping area of the clamp for the stainless steel pipe material during cutting feeding and clamping of the stainless steel pipe material.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a cutting feeding device for medical metal needle head processing, comprising a support platform, one end of the top of the support platform is provided with a cutting knife, further comprising two chains driven to rotate by a servo motor, the two chains form a rectangle, and a plurality of linkage plates arranged at equal intervals are fixedly connected between the two chains through an elastic connecting device, one side of the linkage plate is provided with a passive pressing plate, the passive pressing plate drives the stainless steel pipe material on the support platform to move towards the cutting knife for cutting feeding during rotation of the chain, and the stainless steel pipe material is cut by the cutting knife.

[0006] The pressing device is arranged on the inner side of the linkage plate, and comprises a positioning horizontal plate and a movable horizontal plate arranged in a vertical manner, and an electromagnet and a magnetic block are arranged on the opposite sides of the positioning horizontal plate and the movable horizontal plate respectively, the electromagnet is powered when the cutting knife cuts, and the electromagnet repels the magnetic block when powered.

[0007] Further, the top of the support platform is designed as a smooth plane, so that the frictional resistance between the top of the support platform and the stainless steel pipe is smaller than the frictional resistance between the passive pressing plate and the stainless steel pipe, and when the passive pressing plate moves with the chain, the stainless steel pipe can be moved on the surface of the support platform towards the end of the cutting knife to realize cutting feeding.

[0008] Further, two support plates are fixedly arranged on the two sides of the top of the support platform, two groups of positioning rotating shafts are movably arranged between the two support plates, the two groups of positioning rotating shafts are arranged close to the two ends of the support plates respectively, the number of one group of positioning rotating shafts is two, the two positioning rotating shafts in the same group are arranged in a vertical manner, two sprockets are fixedly arranged on one positioning rotating shaft, the two sprockets are arranged close to the two ends of the positioning rotating shaft respectively, and a chain is transmissionally connected between the four sprockets arranged on the same end of the positioning rotating shaft, and the servo motor is fixedly arranged on one support plate and drives one positioning rotating shaft to rotate, the two groups of positioning rotating shafts are arranged in a rectangular four-corner position structure, so that the two transmission chains form a rectangle, and the pressing device can be arranged on the inner side of the linkage plate, and the movable horizontal plate and the active pressing plate in the pressing device can move downward without affecting the movement of the linkage plate and the passive pressing plate driven by the two chains.

[0009] Further, the elastic connecting device comprises two positioning connecting plates, one of which is fixedly arranged on one side of the chain, a positioning block close to one end of the chain is fixedly arranged between the two positioning connecting plates, and a sliding block is movably arranged between the two positioning connecting plates, the sliding block is arranged at the end of the positioning connecting plate away from the chain, a sliding shaft is movably sleeved on the middle part of the sliding block, the two ends of the sliding shaft extend out of the outer sides of the two positioning connecting plates, one end of the linkage plate is fixedly connected with one end of the sliding shaft, and sliding grooves matched with the sliding shaft are formed in the two positioning connecting plates respectively, and a first spring is arranged between the positioning block and the sliding block, the elastic force of the first spring drives the sliding block, the sliding shaft, the linkage plate and the passive pressing plate to move away from the end of the positioning block, when the passive pressing plate, the linkage plate and the elastic connecting device rotate with the chain to the initial position of the sprocket and then rotate along the outer side of the sprocket, the passive pressing plate will be tilted, and the design that the passive pressing plate, the linkage plate, the sliding shaft and the sliding block can move relative to the positioning block and the positioning connecting plate can prevent the passive pressing plate from bending the stainless steel pipe on the top of the support platform when the sprocket rotates and changes direction.

[0010] Further, the two ends of the sliding shaft are fixedly installed with limiting rings, one side of the two limiting rings is movably connected with the outer side of the two positioning connecting plates respectively, and the diameter value of the limiting ring is greater than the groove width value of the sliding groove, through the limiting effect of the two limiting rings on the outer side of the sliding groove, the sliding shaft and the sliding block can stably move along the sliding groove relative to the positioning connecting plate.

[0011] Further, one side of the linkage plate is provided with a notch, and a passive pressing plate is fixedly installed in the notch of the linkage plate, and the two ends of the passive pressing plate are provided with gaps relative to the two ends of the notch, and the top of the supporting platform is fixedly installed with two limiting plates, and the two limiting plates are movably connected with the two ends of the passive pressing plate respectively, when the passive pressing plate moves with the operation of the chain, the two limiting plates are used for limiting the both sides of the batch of stainless steel pipes on the top of the supporting platform, and the passive pressing plate is used for pressing the stainless steel pipes, so that the batch of stainless steel pipes can be cut into the same length when cutting.

[0012] Further, the two ends of the positioning horizontal plate are fixed on the two supporting plates through L-shaped fixing pieces, and the same number of positioning sleeves corresponding in position are fixedly installed on the bottom of the positioning horizontal plate and the top of the movable horizontal plate, the electromagnet is fixedly installed on the positioning sleeve at the bottom of the positioning horizontal plate, and the magnetic block is fixedly installed on the positioning sleeve at the top of the movable horizontal plate, a plurality of electromagnets and magnetic blocks are arranged on the positioning horizontal plate and the movable horizontal plate correspondingly, so that the magnetic repulsion generated after the electromagnet is electrified can ensure that the passive pressing plate is pressed tightly on the stainless steel pipe being cut by the cutter, and the cutting precision of the stainless steel pipe is prevented from being affected by vibration during cutting.

[0013] Further, two vertical shafts are fixedly installed on the positioning horizontal plate, and the two vertical shafts are close to the two ends of the positioning horizontal plate, the vertical shaft is composed of a thick shaft and a thin shaft, and the thick shaft is above the thin shaft, the bottom of the thick shaft is below the bottom of the electromagnet, the movable horizontal plate is movably sleeved with the thin shaft of the vertical shaft, and the second spring is movably sleeved on the outside of the vertical shaft, when the stainless steel pipe is cut and fed, the movable horizontal plate and the driving pressing plate tend to move downward under the action of the elastic force of the second spring, and then downward pressing force is generated on the linkage plate and the passive pressing plate, so that the passive pressing plate drives the stainless steel pipe to move and realizes cutting and feeding when the chain operates.

[0014] Further, the bottom end of the vertical shaft is fixedly connected with a stop block below the movable horizontal plate, and the stop block is movably connected with the bottom of the movable horizontal plate, through the structural arrangement of the stop block, the movable horizontal plate is prevented from falling.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. This application provides a cutting and feeding device for processing medical metal needles. It comprises several equidistantly arranged linkage plates and passive pressure plates between two chains, with a pressing device inside the linkage plates. The pressing device utilizes a longitudinally movable horizontal plate and an active pressure plate to press down on the linkage plates, causing the passive pressure plates to press down on the stainless steel tube at the top of the support platform. Thus, when the drive chain is running, the passive pressure plates move the stainless steel tube towards one end of the cutting blade to achieve cutting feed. During cutting, the magnetic repulsion generated by energizing an electromagnet clamps the stainless steel tube being cut by the passive pressure plates. This ensures that when the cutting blade performs batch cutting of the stainless steel tube, all passive pressure plates completely cover the stainless steel tube, keeping it stable. This prevents sudden impact forces from occurring at the moment the cutting blade contacts and cuts into the needle tube, which could cause vibration and affect cutting accuracy. It also prevents the feeding servo motor from generating a momentary tracking error, affecting subsequent cutting accuracy.

[0017] 2. A servo motor drives a chain to move a passive pressure plate, which in turn moves the stainless steel pipe to achieve cutting feed. While the cutting blade cuts the stainless steel pipe, an electromagnet is simultaneously energized to generate magnetic repulsion on a magnetic block, increasing the downward pressure of the passive pressure plate on the stainless steel pipe. This prevents the stainless steel pipe from shifting during cutting. Compared to existing cutting devices that require complex servo feeding mechanisms, precision linear modules, and multiple pneumatic or servo clamps, the simplified chain and equidistantly arranged passive pressure plate design significantly reduces manufacturing and maintenance costs. Furthermore, during batch cutting feed, all stainless steel pipes are simultaneously pushed by the equidistantly arranged passive pressure plates, ensuring the inherent consistency of the feed length for all stainless steel pipes and further improving cutting accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0019] Figure 1 This is a schematic diagram of the middle section structure of the present invention;

[0020] Figure 2 for Figure 1 The front view;

[0021] Figure 3 for Figure 1 Schematic diagram of the connection structure between the central linkage plate and the chain;

[0022] Figure 4 forFigure 3 The right view;

[0023] Figure 5 for Figure 3 Schematic diagram of the flexible connection device;

[0024] Figure 6 for Figure 5 The right view;

[0025] Figure 7 for Figure 1 Schematic diagram of the medium-pressure material handling device;

[0026] Figure 8 for Figure 7 The right view.

[0027] In the diagram: 1. Support platform; 2. Support plate; 3. Cutting blade; 4. Positioning shaft; 5. Sprocket; 6. Chain; 7. Servo motor; 8. Elastic connecting device; 801. Positioning connecting plate; 8011. Slide groove; 802. Positioning block; 803. Sliding block; 804. Sliding shaft; 805. Limiting ring; 806. First spring; 9. Linkage plate; 10. Passive pressure plate; 11. Limiting plate; 12. Pressing device; 121. Positioning horizontal plate; 122. Vertical shaft; 123. Movable horizontal plate; 124. Second spring; 125. Active pressure plate; 126. Stop block; 127. Positioning sleeve; 128. Electromagnet; 129. Magnetic block. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-2 A cutting and feeding device for processing medical metal needles includes a support platform 1, with support plates 2 fixedly installed on both sides of the top of the support platform 1. Figure 1 This is a schematic diagram of the middle section of the cutting feed device, and the sectioned part is... Figure 1The structure is symmetrically arranged in the drawing, so only one support plate 2 is drawn in the drawing. One end of the top of the support platform 1 is provided with a cutting knife 3. The top of the support platform 1 is designed as a smooth plane, so that the friction between the surface of the support platform 1 and the stainless steel pipe before cutting of the metal needle is low. The stainless steel pipe is fed to the end of the cutting knife 3 on the top of the support platform 1 and is cut by the cutting knife 3. Two groups of rotatable positioning shafts 4 are movably arranged between the two support plates 2. The two groups of positioning shafts 4 are respectively close to the two ends of the support plate 2. The number of one group of positioning shafts 4 is two, and the two positioning shafts 4 in the same group are arranged above and below. Two sprockets 5 are fixedly installed on one positioning shaft 4, and the two sprockets 5 are respectively close to the two ends of the positioning shaft 4. The four sprockets 5 located at the same end of the positioning shaft 4 are transmissionally connected with a chain 6. The outer side of the support plate 2 is fixedly installed with a servo motor 7 for driving one of the positioning shafts 4 to rotate. The positioning shaft 4 driven by the servo motor 7 drives the sprocket 5 to rotate, so that the chain 6 can run.

[0030] As Figure 1 、 Figures 2-5 The inner sides of the two chains 6 are respectively fixedly installed with a plurality of elastic connection devices 8 arranged at equal distances. The elastic connection device 8 comprises two positioning connecting plates 801. One of the two positioning connecting plates 801 is fixedly installed on one side of the chain 6. A positioning block 802 is fixedly arranged between the two positioning connecting plates 801 and close to one end of the chain 6. A sliding block 803 is movably arranged between the two positioning connecting plates 801. The sliding block 803 is located at one end of the positioning connecting plate 801 away from the chain 6. A sliding shaft 804 is movably sleeved in the middle of the sliding block 803. The two ends of the sliding shaft 804 respectively extend out of the outer sides of the two positioning connecting plates 801. Two slide grooves 8011 are respectively formed in the two positioning connecting plates 801 and matched with the sliding shaft 804, so that the sliding shaft 804 can drive the sliding block 803 to slide along the slide groove 8011. Limiting rings 805 are fixedly installed at the two ends of the sliding shaft 804. The two limiting rings 805 are respectively movably connected with the outer sides of the two positioning connecting plates 801. The diameter value of the limiting ring 805 is greater than the groove width value of the slide groove 8011. Through the limiting action of the two limiting rings 805 outside the slide groove 8011, the sliding shaft 804 and the sliding block 803 can stably move along the slide groove 8011 relative to the positioning connecting plate 801. A first spring 806 is arranged between the sliding block 803 and the positioning block 802. The elastic force of the first spring 806 makes the sliding block 803 and the sliding shaft 804 tend to move away from one end of the positioning block 802.

[0031] The sliding shafts 804 corresponding to the positions (two elastic connecting devices 8 on the opposite sides of the two chains 6) are fixedly connected with linkage plates 9, one side of the linkage plate 9 is provided with a notch, and the passive pressing plate 10 is fixedly installed in the notch of the linkage plate 9. The two ends of the passive pressing plate 10 are provided with gaps with the two ends of the notch. The top of the supporting platform 1 is fixedly installed with two limiting plates 11, and the two limiting plates 11 are movably connected with the two ends of the passive pressing plate 10, respectively. The passive pressing plate 10 moves with the operation of the chain 6, and the friction force drives the stainless steel pipe to move towards one end of the cutting knife 3, and the cutting knife 3 cuts the stainless steel pipe.

[0032] Please refer to Figures 1-2 、 Figures 7-8 The pressing device 12 is arranged between the two supporting plates 2 and located inside the linkage plates 9. The pressing device 12 comprises a positioning horizontal plate 121, the two ends of the positioning horizontal plate 121 are fixed on the two supporting plates 2 through L-shaped fixing pieces, two vertical shafts 122 are fixedly installed on the positioning horizontal plate 121, the two vertical shafts 122 are close to the two ends of the positioning horizontal plate 121, respectively, the vertical shaft 122 is composed of a thick shaft and a thin shaft, and the thick shaft is above the thin shaft, the thin shaft of the vertical shaft 122 movably sleeves an active horizontal plate 123, the active horizontal plate 123 and the positioning horizontal plate 121 are provided with a second spring 124 movably sleeved outside the vertical shaft 122, a plurality of active pressing plates 125 are fixedly installed at the bottom end of the active horizontal plate 123, the bottom of the active pressing plate 125 is movably connected with one side of the linkage plate 9 away from the passive pressing plate 10, the two ends of the active pressing plate 125 are close to the two positioning rotating shafts 4 below the supporting plate 2, respectively, and the two ends of the active pressing plate 125 are designed as smooth chamfers, the active horizontal plate 123 drives the active pressing plate 125 to move downward by the elastic force of the second spring 124, and then the active pressing plate 125 presses the surface of the linkage plate 9, when the linkage plate 9 and the passive pressing plate 10 move towards one end of the cutting knife 3 with the operation of the chain 6, the stainless steel pipe can be moved towards one end of the cutting knife 3 to realize cutting feed by the friction resistance between the passive pressing plate 10 and the stainless steel pipe on the supporting platform 1.

[0033] The bottom end of the vertical shaft 122 is fixedly installed with a stop block 126, and the stop block 126 is movably connected with the bottom of the active horizontal plate 123. Through the structure of the stop block 126, the active horizontal plate 123 is prevented from falling off.

[0034] The bottom of the positioning horizontal plate 121 and the top of the movable horizontal plate 123 are respectively fixedly provided with the same number of positioning sleeves 127 corresponding in position, the positioning sleeve 127 at the bottom of the positioning horizontal plate 121 is fixedly provided with an electromagnet 128, and the positioning sleeve 127 at the top of the movable horizontal plate 123 is fixedly provided with a magnetic block 129. The electromagnet 128 is magnetically repulsive with the magnetic block 129 when electrified. The electromagnet 128 and the driving device for driving the cutting knife 3 are prior art, and the application does not improve the driving device, so it is not described here, and the synchronous electrification is not shown in the figure. When the cutting knife 3 is cutting the stainless steel pipe, the electromagnet 128 is simultaneously electrified to generate a magnetic repulsion force on the magnetic block 129. The magnetic repulsion force further increases the downward pressure of the driving pressure plate 125 on the linkage plate 9, and further increases the downward pressure of the passive pressure plate 10 on the stainless steel pipe, so as to ensure that the stainless steel pipe can be stably cut by the cutting knife 3, and prevent the cutting knife 3 from contacting and cutting into the needle tube at the moment of contact and cutting, thereby preventing the generation of a sudden impact force, causing vibration, affecting the cutting precision, and causing a momentary tracking error of the feeding servo motor, which will affect the subsequent cutting precision.

[0035] In use, first, the stainless steel pipe to be cut for processing metal needle is placed in batches on the support platform 1 away from the cutting knife 3 at one end of the support platform 1, and is pushed to the lower side of the passive pressure plate 10. At the same time, the servo motor 7 is started to drive the positioning shaft 4 to rotate the chain wheel 5, so that the chain 6 operates to drive the stainless steel pipe under pressure to move towards the end of the cutting knife 3. Then, the cutting knife 3 is controlled to cut the stainless steel pipe, and the electromagnet 128 is electrified to generate a magnetic repulsion force on the magnetic block 129, so as to further increase the downward pressure of the passive pressure plate 10 on the stainless steel pipe, so as to ensure that the stainless steel pipe is stably cut by the cutting knife 3. After one cutting is completed, the electromagnet 128 is de-energized to reduce the downward pressure of the passive pressure plate 10 on the stainless steel pipe. The elastic force of the second spring 124 is used to drive the passive pressure plate 10 to cut the stainless steel pipe towards the end of the cutting knife 3.

[0036] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cutting feed device for processing medical metal needle, comprising a support platform, one end of the top of the support platform is provided with a cutting knife, characterized in that, Also include, Two chains driven by servo motor, two chains surround the rectangle, and the two chains are fixedly connected by elastic connecting device with a number of equidistant arrangement of linkage plate, the linkage plate side is provided with passive pressing plate, passive pressing plate with the operation of chain driven stainless steel pipe on the support platform towards the cutting knife moves for cutting feed, by cutting knife on stainless steel pipe cutting; The pressing device is arranged in the inner side of the linkage plate, the pressing device includes upper and lower positioning plate and movable plate, the side of the positioning plate and movable plate is provided with electromagnet and magnetic block respectively, the electromagnet is electrified when the cutting knife cutting, and the electromagnet repels the magnetic block when electrified, the bottom of the movable plate is fixedly installed with the active pressing plate, the bottom of the active pressing plate is movably connected with the side of the linkage plate away from the passive pressing plate, the second spring is arranged between the positioning plate.

2. The cutting feed device for processing a medical metal needle according to claim 1, wherein The top of the support platform is smooth plane design, the friction resistance between the top of the support platform and the stainless steel pipe is less than the friction resistance between the passive pressing plate and the stainless steel pipe, when the passive pressing plate moves with the operation of chain, it can drive the stainless steel pipe to move on the surface of the support platform towards the end of the cutting knife, realize cutting feed.

3. The cutting feed device for processing a medical metal needle according to claim 1, wherein The top of the support platform is smooth plane design, the friction resistance between the top of the support platform and the stainless steel pipe is less than the friction resistance between the passive pressing plate and the stainless steel pipe, when the passive pressing plate moves with the operation of chain, it can drive the stainless steel pipe to move on the surface of the support platform towards the end of the cutting knife, realize cutting feed. The two sides of the top of the support platform are respectively fixedly installed with support plate, two groups of rotatable positioning shafts are movably arranged between the two support plates, the two groups of positioning shafts are respectively close to the two ends of the support plate, the number of a group of positioning shafts is two, and the two positioning shafts in the same group are arranged above and below, two sprockets are fixedly installed on one positioning shaft, and the two sprockets are respectively close to the two ends of the positioning shaft, the chain is transmission connected between the four sprockets on the same end of the positioning shaft, the servo motor is fixedly installed on one of the support plates, and the servo motor drives one of the positioning shafts to rotate, the two groups of positioning shafts are arranged in the position structure of rectangular four corners, so that the two transmission chains form a rectangle, and the pressing device can be arranged in the inner side of the linkage plate, the movable plate and the active pressing plate in the pressing device are moved without affecting the movement of the linkage plate and the passive pressing plate driven by the two chains.

4. The cutting feed device for processing a medical metal needle according to claim 1, wherein The elastic connecting device comprises two positioning connecting plates, one of which is fixedly installed on one side of the chain, a positioning block is fixedly arranged between the two positioning connecting plates close to one end of the chain, and a sliding block is movably arranged between the two positioning connecting plates, the sliding block is located at the end of the positioning connecting plate away from the chain, a sliding shaft is movably sleeved on the middle part of the sliding block, the two ends of the sliding shaft extend out of the two positioning connecting plates, one end of the linkage plate is fixedly connected with one end of the sliding shaft, sliding grooves matched with the sliding shaft are formed in the two positioning connecting plates, a first spring is arranged between the positioning block and the sliding block, and the elastic force of the first spring enables the sliding block, the sliding shaft, the linkage plate and the passive pressing plate to move away from the end of the positioning block. When the passive pressing plate, the linkage plate and the elastic connecting device rotate with the chain to the initial position of the sprocket and then turn to the reverse direction along the outer side of the sprocket, the passive pressing plate will be inclined, and the design that the passive pressing plate, the linkage plate, the sliding shaft and the sliding block can move relative to the positioning block and the positioning connecting plate can prevent the passive pressing plate from bending the stainless steel pipes on the top of the supporting platform when the sprocket rotates to the reverse direction.

5. The cutting feed device for processing a medical metal needle according to claim 4, wherein The two ends of the sliding shaft are fixedly installed with limiting rings, one side of the two limiting rings is movably connected with the outer sides of the two positioning connecting plates, and the diameter of the limiting ring is greater than the groove width of the sliding groove. Through the limiting effect of the two limiting rings outside the sliding groove, the sliding shaft and the sliding block can stably move along the sliding groove relative to the positioning connecting plate.

6. The cutting feed device for processing a medical metal needle according to claim 1, wherein A notch is formed in one side of the linkage plate, and a passive pressing plate is fixedly installed in the notch of the linkage plate, the two ends of the passive pressing plate are provided with gaps relative to the two ends of the notch, two limiting plates are fixedly installed on the top of the supporting platform, the two limiting plates are movably connected with the two ends of the passive pressing plate, and the two limiting plates are used for limiting the two sides of the batch of stainless steel pipes on the top of the supporting platform when the passive pressing plate moves with the chain, and the passive pressing plate is used for pressing the stainless steel pipes, so that the batch of stainless steel pipes can be cut to the same length.

7. The cutting feed device for processing a medical metal needle according to claim 1, wherein The two ends of the positioning horizontal plate are fixed on the two supporting plates through L-shaped fixing pieces, and the same number of positioning sleeves are fixedly installed on the bottom of the positioning horizontal plate and the top of the movable horizontal plate in a one-to-one correspondence, the electromagnet is fixedly installed on the positioning sleeve at the bottom of the positioning horizontal plate, and the magnetic block is fixedly installed on the positioning sleeve at the top of the movable horizontal plate. By arranging a plurality of electromagnets and magnetic blocks on the positioning horizontal plate and the movable horizontal plate, the magnetic repulsion generated after the electromagnet is electrified can ensure that the passive pressing plate tightly presses the stainless steel pipes being cut by the cutter, and the cutting precision of the stainless steel pipes is prevented from being affected due to vibration during cutting.

8. The cutting feed apparatus for processing a medical metal needle according to claim 1, wherein The positioning horizontal plate is fixedly provided with two vertical shafts, which are respectively arranged close to two ends of the positioning horizontal plate, the vertical shaft is composed of a thick shaft and a thin shaft, the thick shaft is arranged above the thin shaft, the bottom of the thick shaft is arranged below the bottom of the electromagnet, the movable horizontal plate is movably sleeved with the thin shaft of the vertical shaft, and the second spring is movably sleeved outside the vertical shaft, when the stainless steel pipe is cut and fed, the movable horizontal plate and the driving pressing plate are driven to move downward by the elastic force of the second spring, thereby generating downward pressing force on the linkage plate and the passive pressing plate, and the passive pressing plate drives the stainless steel pipe to move to realize cutting and feeding when the chain operates.

9. The cutting feed device for processing a medical metal needle according to claim 8, wherein The bottom end of the vertical shaft is fixedly connected with a stopper arranged below the movable horizontal plate, and the stopper is movably connected with the bottom of the movable horizontal plate, so that the movable horizontal plate is prevented from falling off through the structural arrangement of the stopper.

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