End socket necking machine special for thin-wall medical pipe
By designing a special head and mouth shrinking machine for thin-wall medical pipes, the roller components of the electric heating unit and the shaping shrinking unit are used to solve the problems of insufficient preheating, fast heat loss and shape rebound of thin-wall medical pipes during the shaping process, and achieve efficient and low-cost head shrinking molding.
Patent Information
- Application Number
- CN202422158127.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing head sealing and mouth shrinking machines are difficult to be suitable for thin-walled medical pipes, and there are problems such as insufficient preheating, rapid heat loss, easy wear marks and scratches during the plastic surgery, and rebound in the molded edge shape.
A special head and mouth shrinking machine for thin-wall medical pipes is designed, including a fuselage, a power box, a chuck, a shaping shrinking unit, a sliding table, an electric heating unit and a limiting unit. The thin-wall medical pipes are preheated and heated by the electric heating unit, and the head and mouth shrinking operation is performed using the roller assembly of the shaping shrinking unit to avoid thermal stress and shape rebound.
It realizes stable temperature control of thin-walled medical pipes during the plastic shaping process, avoids the occurrence of wear marks and scratches, reduces the molding cost and time, and improves the molding quality.
Smart Images
Figure CN223129155U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical tube forming and manufacturing, in particular to a special head shrinking machine for thin-walled medical tubes. Background Art
[0002] The existing head shrinking machines on the market are mainly applied to the head shrinking of pressure vessels, gas storage tanks, solar water heaters and other heads, and have the advantages of no need to replace molds, high efficiency and good roundness. However, the existing head shrinking machines have limitations in their applicable ranges. They are only applicable to workpieces with relatively thick pipe walls and are difficult to be applicable to thin-walled medical tubes. The reasons are as follows: 1) The existing head shrinking machines have no preheating and heat tracing functions, and only preheat the thin-walled medical tubes before formal processing. Coupled with the thin-walled characteristics of thin-walled pipe fittings, the heat dissipation speed is extremely fast, and it is difficult to continuously complete the shaping at a high temperature state, resulting in the temperature of the thin-walled medical tubes being difficult to meet the specific temperature requirements of each shaping stage in the process control document; 2) During the shaping process, the shaping tool head always presses tightly on the thin-walled pipe fitting, and a large number of abrasion marks and scratches are easily generated on the outer side wall of the thin-walled pipe fitting due to the excessive friction force, and a large amount of manpower and material resources need to be invested in subsequent repair; 3) With the continuous release of internal stress, the formed sealing edge of the thin-walled medical tube after shaping is prone to the phenomenon of "shape springback", which will inevitably lead to the outer shape size of the finished thin-walled medical tube being difficult to meet the quality inspection standards. Therefore, it is urgent for those skilled in the art to solve the above problems. Summary of the Utility Model
[0003] Therefore, in view of the above existing problems and defects, the research and development group of the utility model subject collected relevant materials, through multi-party evaluation and consideration, and through continuous experiments and modifications by the research and development group personnel, finally led to the emergence of the special head shrinking machine for thin-walled medical tubes.
[0004] In order to solve the above technical problems, the utility model relates to a special head shrinking machine for thin-walled medical tubes, which includes a fuselage, a power box, a chuck, a shaping and shrinking unit, a sliding table and an electric heating unit. The fuselage is in a horizontal state and is used as the installation base of the power box. The chuck is used to clamp the thin-walled medical tube and continuously performs a circumferential rotation movement under the driving force from the power box. The sliding table takes the fuselage as the installation base and has degrees of freedom of displacement in the X direction and the Y direction. The shaping and shrinking unit is carried by the sliding table and approaches / separates from the chuck under the driving of pushing and pulling forces. The electric heating unit is applied in a supporting manner with the shaping and shrinking unit to continuously input heat to the thin-walled medical tube to be shaped and shrunk or the thin-walled medical tube during the shaping and shrinking process, and is arranged on one side of the fuselage.
[0005] As a further improvement to the technical solution disclosed by the present utility model, the shaping and necking unit includes a mounting base, an X-direction shaping and necking roller assembly, and a Y-direction shaping and necking roller assembly. The mounting base is detachably assembled with the sliding table and serves as the assembly basis for the X-direction shaping and necking roller assembly and the Y-direction shaping and necking roller assembly.
[0006] As a further improvement to the technical solution disclosed by the present utility model, the shaping and necking unit further includes a first locking screw and a second locking screw. The mounting base is integrally formed with a first mounting hole and a second mounting hole for inserting the X-direction shaping and necking roller assembly and the Y-direction shaping and necking roller assembly respectively. The first locking screw is used to restrict the axial displacement freedom and circumferential rotation freedom of the X-direction shaping and necking roller assembly. Correspondingly, a first threaded hole adapted to the first locking screw and communicating with the first mounting hole is formed on the mounting base. The second locking screw is used to restrict the axial displacement freedom and circumferential rotation freedom of the Y-direction shaping and necking roller assembly. Correspondingly, a second threaded hole adapted to the second locking screw and communicating with the second mounting hole is formed on the mounting base.
[0007] As a further improvement to the technical solution disclosed by the present utility model, the sliding table includes a chassis, a Y-direction sliding plate, an X-direction sliding plate, a Y-direction slide rail and slider assembly, and an X-direction slide rail and slider assembly. The chassis is assembled with the fuselage as a whole, and one end thereof abuts against the power box. The Y-direction sliding plate is arranged directly above the chassis, and a Y-direction slide rail and slider assembly is assembled between the two. The X-direction sliding plate is arranged directly above the Y-direction sliding plate, and an X-direction slide rail and slider assembly is assembled between the two.
[0008] As a further improvement to the technical solution disclosed by the present utility model, the electric heating unit includes a control host and a high-frequency heating coil. The high-frequency heating coil uses electromagnetic induction to heat the thin-walled medical tubing, and its input current, input voltage, displacement direction, and displacement speed are all determined by the control host.
[0009] As a further improvement to the technical solution disclosed by the present utility model, the special head necking machine for thin-walled medical tubing further includes a workpiece inner support core. The workpiece inner support core is used to balance the clamping force applied by the chuck on the outer wall of the thin-walled medical tubing, and it is pre-installed in the cavity of the thin-walled medical tubing.
[0010] As a further improvement to the technical solution disclosed by the present utility model, the special head necking machine for thin-walled medical tubing further includes a limiting unit. The limiting unit is used to limit the position of the thin-walled medical tubing, and it takes the power box as the installation basis.
[0011] As a further improvement to the technical solution disclosed by the present utility model, the limiting unit includes a support frame and an electric telescopic rod. The support frame is used to bear the electric telescopic rod, and is detachably fixed to one side of the power box and is located directly above the chuck. The electric telescopic rod is used as the positioning reference for the thin-walled medical tubing.
[0012] The working principle of the special head shrinking and necking machine for thin-walled medical tubing disclosed by the present utility model is generally as follows: First, the thin-walled medical tubing is clamped in the chuck; the power box is started to drive the chuck and the thin-walled medical tubing to perform a circumferential rotational movement. At the same time, the electric heating unit is started to preheat the thin-walled medical tubing; subsequently, the sliding table is driven, and then the shaping and necking unit is moved close to the thin-walled medical tubing to perform the necking and heading operation on it. And during the entire necking and heading process, the electric heating unit continuously heats the thin-walled medical tubing.
[0013] In practical applications, the special head shrinking and necking machine for thin-walled medical tubing disclosed by the present utility model has at least achieved the following beneficial technical effects, specifically manifested as:
[0014] 1) By preheating the thin-walled medical tubing with the electric heating unit and continuously heating it, the thin-walled medical tubing is maintained within a reasonable temperature range throughout the shaping process, so as to better meet the specific temperature requirements of the process documentation for each shaping stage. In this way, on the one hand, the material of the thin-walled medical tubing is modified under the action of high temperature, which is conducive to performing head shrinking and necking shaping on it; on the other hand, internal stresses such as thermal stress or shrinkage stress generated during the shaping process of the thin-walled medical tubing are avoided, which is conducive to improving the forming quality of the thin-walled medical tubing.
[0015] 2) It can effectively avoid the occurrence of the "shape springback" phenomenon of the formed edge, and there is no need to perform a secondary shaping operation, greatly reducing the manufacturing cost and the man-hours for single-piece production.
[0016] 3) The design structure is simple, easy to manufacture and implement (it can even be transformed from an old machine tool), and the manufacturing cost is relatively low; Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0018] Figure 1 is a three-dimensional schematic diagram of the special head shrinking and necking machine for thin-walled medical tubing disclosed by the present utility model.
[0019] Figure 2 isFigure 1 Front view of .
[0020] Figure 3 yes Figure 1 Side view of.
[0021] Figure 4 yes Figure 1 Top view of the .
[0022] Figure 5 yes Figure 1 A partial enlarged view of I.
[0023] 1-body; 2-power box; 3-chuck; 4-shaping and shrinking unit; 41-mounting seat; 42-X-axis shaping and shrinking roller assembly; 43-Y-axis shaping and shrinking roller assembly; 44-first locking screw; 45-second locking screw; 5-sliding table; 51-base; 52-Y-axis sliding plate; 53-X-axis sliding plate; 54-Y-axis slide rail and slider assembly; 55-X-axis slide rail and slider assembly; 6-electric heating unit; 61-control host; 62-high-frequency heating coil; 7-workpiece inner support core; 8-limiting unit; 81-support frame; 82-electric telescopic rod. DETAILED DESCRIPTION
[0024] The following is a further detailed description of the contents disclosed in the utility model in conjunction with specific embodiments. Figures 1-4 The schematic diagram of the structure of the special head shrinking machine for thin-walled medical tubes disclosed in the utility model is shown together. It can be seen that it is mainly composed of several parts such as a fuselage 1, a power box 2, a chuck 3, a shaping and shrinking unit 4, a sliding table 5 and an electric heating unit 6. Among them, the fuselage 1 is in a horizontal state, and it is used as the installation base of the power box 2. The chuck 3 is used to clamp the thin-walled medical tube, and it continuously performs circumferential rotation under the driving force from the power box 2. The sliding table 5 uses the fuselage 1 as the installation base, and it has both the X-direction displacement freedom and the Y-direction displacement freedom. The shaping and shrinking unit 4 is carried by the sliding table 5, and it is driven by the push-pull force to approach / move away from the chuck 3. The electric heating unit 6 is used in conjunction with the shaping and shrinking unit 4 to continuously input heat to the thin-walled medical tube to be shaped and shrunken or the thin-walled medical tube in the shaping and shrinking process, and it is arranged on one side of the fuselage 1.
[0025] The working principle of the special head shrinking machine for thin-walled medical tubes disclosed by the present utility model is generally as follows: First, the thin-walled medical tube is clamped in the chuck 3; the power box 2 is started to drive the chuck 3 and the thin-walled medical tube to perform circumferential rotational motion. At the same time, the electric heating unit 6 is started to preheat the thin-walled medical tube; subsequently, the sliding table 5 is driven, and then the shaping and shrinking unit 4 is towed close to the thin-walled medical tube to perform the shrinking and heading operation on it, and during the entire shrinking and heading process, the electric heating unit 6 continuously heats the thin-walled medical tube.
[0026] As can be seen from the above description, during the process of performing the heading and shrinking process, by preheating the thin-walled medical tube with the electric heating unit 6 and continuously heating it, the thin-walled medical tube is maintained within a reasonable temperature range throughout the shaping process to better meet the specific temperature requirements of the process control documents for each shaping stage. In this way, on the one hand, the material of the thin-walled medical tube is modified under the action of high temperature, which is beneficial to the heading and shrinking shaping of it; on the other hand, the generation of internal stresses such as thermal stress or shrinkage stress in the thin-walled medical tube during the shaping process is avoided, which is beneficial to improving the forming quality of the thin-walled medical tube.
[0027] Here, it should also be noted that because the thin-walled medical tube is maintained at a high temperature during the shaping process, the occurrence of the "shape springback" phenomenon of the formed edge is effectively avoided, and there is no need to perform secondary shaping operation, which greatly reduces the manufacturing cost and the single-piece manufacturing man-hour.
[0028] In the prior art, the heading and shrinking operation on the workpiece is usually performed by means of a shaping knife, and the tool tip needs to continuously press against the workpiece, which is very likely to form a large number of abrasion marks or scratches on the surface of the workpiece, especially in the case of thin-walled medical tubes. In view of this, as a further optimization of the above technical solution, as Figure 4 、 5 shown, the shaping and shrinking unit 4 mainly consists of a mounting seat 41, an X-direction shaping and shrinking roller assembly 42, a Y-direction shaping and shrinking roller assembly 43 and other parts. The mounting seat 41 is assembled with the sliding table 5 in a detachable manner, and it is used as the assembly basis for the X-direction shaping and shrinking roller assembly 42 and the Y-direction shaping and shrinking roller assembly 43. Whether it is the X-direction shaping and shrinking roller assembly 42 or the Y-direction shaping and shrinking roller assembly 43, both use profiling rollers to perform the plugging and shrinking operation on the thin-walled medical tube. In this way, during the shaping process, the profiling rollers belonging to the X-direction shaping and shrinking roller assembly 42 and the Y-direction shaping and shrinking roller assembly 43 always roll along the outer wall of the thin-walled medical tube instead of sliding, thus effectively avoiding the occurrence of abrasion marks or scratches on the thin-walled medical tube due to excessive frictional force.
[0029] Furthermore, from Figure 4 、 5It can also be clearly seen from what is shown in the figure that the shaping and necking unit 4 is further provided with a first locking screw 44 and a second locking screw 45, which are respectively used to lock the X-direction shaping and necking roller assembly 42 and the Y-direction shaping and necking roller assembly 43. A first mounting hole and a second mounting hole are formed on the mounting seat 41 at the same time, which are respectively used to insert the X-direction shaping and necking roller assembly 42 and the Y-direction shaping and necking roller assembly 43. The first locking screw 44 is used to limit the axial displacement freedom and circumferential rotation freedom of the X-direction shaping and necking roller assembly 42. Correspondingly, a first threaded hole adapted to the first locking screw 44 and communicating with the first mounting hole is formed on the mounting seat 41. The second locking screw 45 is used to limit the axial displacement freedom and circumferential rotation freedom of the Y-direction shaping and necking roller assembly 43. Correspondingly, a second threaded hole adapted to the second locking screw and communicating with the second mounting hole is formed on the mounting seat 41. Thus, taking the X-direction shaping and necking roller assembly 42 as an example, when performing an assembly operation on it, first insert the X-direction shaping and necking roller assembly 42 into the first mounting hole, then adjust its relative position and attitude to meet the standard, and then tighten the first locking screw 44. When it is necessary to adjust the relative position or attitude of the X-direction shaping and necking roller assembly 42, only need to loosen the first locking screw 44 to release the restriction on the freedom of the X-direction shaping and necking roller assembly 42, readjust the relative position and attitude of the X-direction shaping and necking roller assembly 42 to the expected value, and then tighten the first locking screw 44 again. The whole operation process is convenient, fast, and can be easily completed by a single worker.
[0030] It is known that, according to design common sense, the sliding table 5 can adopt a variety of design structures to realize the dragging of the shaping and necking unit 4. However, here a design structure with simple design, easy to manufacture and implement, and excellent dragging and guiding performance is recommended. Specifically, as Figure 5 shown in the figure, the sliding table mainly consists of a chassis 51, a Y-direction sliding plate 52, an X-direction sliding plate 53, a Y-direction slide rail and slider assembly 54, and an X-direction slide rail and slider assembly 55. Among them, the chassis 51 is assembled with the fuselage 1 as a whole, and one end of it abuts against the power box 2. The Y-direction sliding plate 52 is arranged directly above the chassis 51, and a Y-direction slide rail and slider assembly 54 is assembled between the two. The X-direction sliding plate 53 is arranged directly above the Y-direction sliding plate 52, and an X-direction slide rail and slider assembly 55 is assembled between the two.
[0031] As Figure 1 、 3As shown in the figure, the electric heating unit 6 is mainly composed of two parts, namely, a control host 61 and a high-frequency heating coil 62. The high-frequency heating coil 62 uses electromagnetic induction to heat thin-walled medical tubing, and has the advantages of fast heating speed and simple structure. The control host 61 is arranged on one side of the body 1, and is used to control the heating process of the high-frequency heating coil 62, that is, the input current, input voltage, displacement direction and displacement speed are all determined by the control host 61.
[0032] Since the wall thickness of thin-walled medical tubing is extremely small, its compressive strength is extremely limited. In view of this, as a further optimization of the above technical solution, the thin-walled medical tubing special head shrinking machine is also provided with a workpiece inner support core 7. The workpiece inner support core 7 is used to balance the clamping force applied by the chuck 3 on the outer wall of the thin-walled medical tubing, and it is pre-installed in the cavity of the thin-walled medical tubing. By adopting the above technical solution, the deformation or pressure loss of the thin-walled medical tubing due to the excessive clamping force is effectively avoided.
[0033] Finally, it should be noted that, in order to ensure that the clamped thin-walled medical tube occupies the correct position relative to the chuck 3 and the high-frequency heating coil 62, and thus facilitate the smooth implementation of the subsequent repair process, as a further optimization of the above technical solution, Figure 1 , 2 As shown in the figure, the thin-wall medical tube special head shrinking machine is also provided with a limit unit 8. The limit unit 8 is used to limit the position of the thin-wall medical tube, and the power box 2 is used as the installation base. The limit unit 8 is mainly composed of a support frame 81 and an electric telescopic rod 82. The support frame 81 is used to support the electric telescopic rod 82, which is detachably fixed to one side of the power box 2 and is located directly above the chuck 3. The electric telescopic rod 82 is used as a positioning reference for the thin-wall medical tube.
[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A special head necking machine for thin-walled medical tubing, characterized in that, It includes a fuselage, a power box, a chuck, a shaping and necking unit, a sliding table and an electric heating unit; the fuselage is in a horizontal state and serves as the installation base for the power box; the chuck is used to clamp thin-walled medical tubes and continuously performs circumferential rotational motion under the driving force from the power box; the sliding table takes the fuselage as the installation base and has degrees of freedom of displacement in the X direction and the Y direction; the shaping and necking unit is carried by the sliding table and approaches / separates from the chuck under the drive of pushing and pulling forces; the electric heating unit is applied in cooperation with the shaping and necking unit to continuously input heat to the thin-walled medical tube to be shaped and necked or the thin-walled medical tube during the shaping and necking process, and is arranged on one side of the fuselage.
2. The special necking machine for the thin-walled medical tubing end cap according to claim 1, wherein The shaping and necking unit includes a mounting seat, an X-direction shaping and necking roller assembly and a Y-direction shaping and necking roller assembly; the mounting seat is assembled with the sliding table in a detachable manner and serves as the assembly base for the X-direction shaping and necking roller assembly and the Y-direction shaping and necking roller assembly.
3. The special necking machine for the thin-wall medical tubing end cap according to claim 2, characterized in that, The shaping and necking unit further includes a first locking screw and a second locking screw; the mounting seat is simultaneously formed with a first mounting hole and a second mounting hole to respectively insert the X-direction shaping and necking roller assembly and the Y-direction shaping and necking roller assembly; the first locking screw is used to limit the axial displacement degree of freedom and the circumferential rotational degree of freedom of the X-direction shaping and necking roller assembly. Correspondingly, a first threaded hole adapted to the first locking screw and communicating with the first mounting hole is formed on the mounting seat; the second locking screw is used to limit the axial displacement degree of freedom and the circumferential rotational degree of freedom of the Y-direction shaping and necking roller assembly. Correspondingly, a second threaded hole adapted to the second locking screw and communicating with the second mounting hole is formed on the mounting seat.
4. The special necking machine for the thin-walled medical tubing end cap according to claim 1, wherein, The sliding table includes a chassis, a Y-direction sliding plate, an X-direction sliding plate, a Y-direction slide rail and slider assembly, and an X-direction slide rail and slider assembly; the chassis is assembled with the fuselage as a whole, and one end of it abuts against the power box; the Y-direction sliding plate is arranged directly above the chassis, and the Y-direction slide rail and slider assembly is assembled between them; the X-direction sliding plate is arranged directly above the Y-direction sliding plate, and the X-direction slide rail and slider assembly is assembled between them.
5. The special necking machine for the thin-wall medical tubing end cap according to claim 1, wherein The electric heating unit includes a control host and a high-frequency heating coil; the high-frequency heating coil uses electromagnetic induction to heat the thin-walled medical tube, and its input current, input voltage, displacement direction and displacement speed are all determined by the control host.
6. The special head necking machine for thin-walled medical tubing according to any one of claims 1-5, characterized in that, It further includes a workpiece internal support core; the workpiece internal support core is used to balance the clamping force applied by the chuck on the outer wall of the thin-walled medical tube and is pre-installed in the cavity of the thin-walled medical tube.
7. The special necking machine for the thin-walled medical tubing end cap according to any one of claims 1-5, characterized in that, It further includes a limiting unit; the limiting unit is used to limit the position of the thin-walled medical tube and takes the power box as the installation base.
8. The special head necking machine for thin-walled medical tubing according to claim 7, characterized in that, The limiting unit includes a support frame and an electric telescopic rod; the support frame is used to bear the electric telescopic rod, and is detachably fixed to one side of the power box and located directly above the chuck; the electric telescopic rod is used as the positioning reference for the thin-walled medical tubing.