Medical device and method for manufacturing medical device

Abstract

In order to improve the manufacture of a medical device having at least one device body part, wherein the at least one device body part is produced from a device body part blank by forming, it is proposed that the at least one device body part has at least one deburring surface formed by milling, in particular by machine milling, the at least one deburring surface comprising one or more parts, each part of the at least one deburring surface extending perpendicularly to a common machining plane, the normal of the machining plane defining a deburring longitudinal axis, the at least one deburring surface extending parallel to the deburring longitudinal axis. Furthermore, an improved method for manufacturing a medical device is proposed.

Description

Technical Field

[0001] The invention relates to a medical device having at least one device body component, wherein the at least one device body component is produced by forming a device body component blank.

[0002] Furthermore, the invention relates to a method for producing a medical device comprising at least one device body part, in which method a device body part blank is reshaped and burrs generated during the forming process, in particular burrs generated due to tolerances and process fluctuations, are removed. Background Art

[0003] In particular, medical instruments having two instrument body parts which are pivotally mounted relative to one another are known. The instrument body parts of such instruments are in particular formed from blanks (hereinafter also referred to as instrument body part blanks). This results in protruding or projecting burrs. These burrs are usually removed by manual guide belt grinding.

[0004] Disadvantages of the production of known medical instruments are, in particular, the fluctuations in shape and size that occur due to the manually guided machining process. In addition, when removing burrs produced during the forming process by belt grinding, in particular manually guided, an undefined heat input occurs into the instrument body part formed by reshaping the instrument body part blank. Summary of the invention

[0005] It is therefore an object of the present invention to improve the production of a medical device of the kind described at the outset.

[0006] This object is achieved by a medical device of the type initially described according to the invention, wherein at least one device body part has at least one deburring surface formed by milling (especially by machine milling), wherein the at least one deburring surface comprises one or more parts, wherein each part of the at least one deburring surface extends perpendicular to a common machining plane, wherein the normal of the machining plane defines a deburring longitudinal axis, and wherein the at least one deburring surface extends parallel to the deburring longitudinal axis.

[0007] By forming a deburring surface defined as described, an instrument body part of a medical instrument can be constructed in a highly precise and reproducible manner. In particular, when milling is carried out by machine, in particular in a computer-controlled manner, process fluctuations that occur and are therefore inevitable in manually guided machining processes of the instrument body parts can be eliminated or at least significantly reduced. In particular, milling also has the advantage that the reshaped instrument body part blank is not overheated as is the case when burrs are removed by belt grinding. In addition, a clearly visible deburring surface is formed on the instrument or at least one instrument body part, which deburring surface remains clearly visible after further, optional processing processes (such as polishing or sandblasting, for example). Therefore, such a deburring surface with alignment as proposed cannot be obtained by manually guided machining processes. In summary, a medical instrument with high quality and significantly improved reproducibility can be formed.

[0008] It is advantageous if the at least one deburring surface has a self-sealing design. Such a surface can be formed in one machining step by means of a milling tool running down the reshaped blank of the device body part. In particular, this can be achieved in a simple manner by computer-assisted milling. In the case of the device body part, the self-sealing deburring surface can be formed in particular in the region of the finger ring (also referred to as eyelet).

[0009] It is advantageous if the at least one deburring surface has a planar configuration in a section and / or is configured in a section to be convexly curved away from the at least one instrument body part and / or is configured to be concavely curved away from the at least one instrument body part.

[0010] Such a deburring surface can in particular be configured continuously (i.e., in each of its parts) perpendicularly to the machining plane and thus parallel to the deburring longitudinal axis. This allows improved reproducibility and a defined configuration of the at least one deburring surface. Furthermore, at least one deburring surface can be realized with any curvature.

[0011] It is advantageous if the at least one deburring surface curved in the segment is configured to be curved in only one dimension and if the radius of curvature of the deburring surface is defined only relative to the deburring longitudinal axis. In other words, the at least one deburring surface curved in the segment can be described as a strip-shaped surface which extends perpendicularly to the machining plane and therefore parallel to the deburring longitudinal axis.

[0012] The radius of curvature is preferably constant in the segment or varies continuously in the segment along the extension of at least one deburring surface. Thus, the deburring surface can be configured to be curved in any manner, in particular in any manner in one dimension.

[0013] According to another preferred embodiment of the present invention, it can be provided that at least two face portions of at least one deburring face extend parallel or substantially parallel to each other. For example, two deburring faces can define planar face portions extending parallel to each other. In particular, this can be achieved on an elongated branch, also referred to as an arm of the medical device. In particular, in the case of a medical device comprising two device body parts pivotably held to each other, such a portion can be formed on the proximal side of a joint or a joint region connecting the device body parts, the joint region also referred to as a closed region. In particular, the portion can extend between a closed region of the device body part and a finger ring or eyelet.

[0014] If at least one instrument body part is formed by cold forming from an instrument body part blank, the medical instrument can be constructed in a simple manner. In addition, a very stable instrument body part can be obtained as a result.

[0015] It is advantageous if the medical device comprises two device body parts and if the two device body parts are mounted on each other so as to be pivotable about a pivot axis. In particular, such a configuration can form a medical device in the form of, for example, scissors, clips, needle holders or the like. In particular, two tool elements can be provided on the device which are movable relative to each other and cooperate with each other, wherein, for example, each of the two device body parts can carry or support a tool element.

[0016] In particular, the manufacture of the medical device can be simplified by defining the deburring longitudinal axis by the pivot axis. For example, the pivot axis can be defined by a joint pin arranged or formed on one of the two instrument body parts. The other of the two instrument body parts can then be movably mounted or supported on the joint pin. For example, such a joint pin can be inserted into a hole in the instrument body part, wherein the joint pin is then permanently connected to one of the two instrument body parts, for example by bonding or welding. It is advantageous to specifically align the pivot axis in this way so that it is defined by the deburring longitudinal axis (i.e., extends perpendicularly to the machining plane), in particular in that: such a hole for the joint pin can be formed in a simple manner on the instrument body part, in particular when the instrument body part is held and the milling tool is moved relative to the instrument body part. Therefore, the deburring surface and the hole defining the pivot axis can be formed on one or both instrument body parts in one step. In particular, such a precise alignment of the pivot axis of the instrument relative to at least one deburring surface particularly well shows that the instrument body part is not deburred by a manually guided processing operation but by a machine.

[0017] In order to reduce the risk of injury to the user of the instrument, it is advantageous to polish at least one of the instrument body parts. In particular, polishing can be performed by vibration grinding. Final corners and edges can thus be removed or rounded in a defined manner.

[0018] In order to provide the medical device with a characteristic surface, it is advantageous if at least one device body part is blasted. In particular, this can be done by sandblasting or shot peening.

[0019] In order to be able to form a particularly stable medical instrument, it is advantageous if at least one instrument body part is made of a metallic material. In particular, it can be made of tool steel.

[0020] The object stated at the outset is further achieved according to a method of the kind described at the outset of the invention, wherein burrs are removed by milling, in particular machine milling, wherein at least one device body part is held during the milling process, wherein in order to remove the burrs, the milling tool is rotated about a longitudinal deburring axis, and in order to form at least one deburring surface, the milling tool is moved in a machining plane, the normal of which defines the longitudinal deburring axis, and the alignment of the longitudinal deburring axis relative to the machining plane is not changed during the deburring process.

[0021] In the method described, the burrs are therefore not removed by manually guided belt grinding as in the prior art, but by milling. In addition, milling is performed in a specific manner by a milling tool that rotates around the longitudinal axis of the deburring. Therefore, the machining plane extends perpendicular to the longitudinal axis of the deburring. During the entire milling process, the reshaped instrument body component blank is particularly maintained in a defined manner relative to the milling tool, that is, preferably so that the machining plane does not change its alignment relative to the longitudinal axis of the deburring or relative to the instrument body component blank. In this way, in particular, an instrument body component as described above can be formed, wherein each part of at least one deburring surface extends perpendicular to a common machining plane, wherein the normal of the machining plane defines the longitudinal axis of the deburring, so that the at least one deburring surface extends parallel to the longitudinal axis of the deburring. Therefore, the instrument body component blank can be clamped in, for example, a machine in order to hold the instrument body component blank, and then the milling tool is guided along the instrument component blank with a defined alignment. This can be achieved, for example, in a manually guided manner supported by a guide device, or fully automatically using a CNC milling machine. In this way, the deburring of at least one instrument body part can be carried out fully automatically by the machine.

[0022] The deburring is advantageously carried out in a computer-controlled manner. Thus, in particular, a particularly high reproducibility can be achieved in the shaping of the device body parts. Computer-controlled milling for deburring also has the advantage that no precise guides are necessary. Computer-controlled milling can in particular be programmed at will, so that any deburred surface can be formed thereby.

[0023] During the removal of burrs in order to form at least one deburred surface, a portion of the instrument body component is preferably also removed. It is to be understood that, in particular, not only the burrs generated during the forming of the instrument body component blank are removed, but also a portion of the instrument body component is removed. Thus, the instrument body component can be formed in a highly precise form and in a highly defined manner. Furthermore, the width of at least one deburred surface can be set in such a way that the deburred surface is clearly visible to the user. Thus, in particular, an instrument manufactured according to the described manufacturing method can be distinguished in a simple and safe manner from a medical instrument which has been deburred by a manually guided processing procedure.

[0024] If the device body component blank is produced by punching or cutting a sheet material, the medical device can be formed in a simple and cost-effective manner. In particular, the device body component blank can be separated from the sheet material by laser cutting. Thus, in particular, the device body component blank can be formed in a defined and reproducible manner.

[0025] In particular, a particularly stable medical instrument with a long service life can be formed by at least one instrument body part made of a metallic material. In particular, it can be made of tool steel.

[0026] The device body blank is advantageously reshaped by cold forming. In particular, this can be achieved by inserting the device body component blank into a stamping tool. The device body component blank can be dimensioned in particular to produce a full-circle or substantially full-circle burr during the forming process. This makes it particularly convenient to process the device body component after forming to remove the burr. In particular, a defined deburring surface can be formed as a result.

[0027] It is advantageous if the device body component blank is formed to the final profile of at least one device body component, from which the generated burrs extend. In particular, this approach ensures that the desired final profile of the device body component can be maintained, even after deburring.

[0028] Furthermore, it is advantageous if at least one continuous burr is formed during the shaping of the device body component blank. Such a burr can be removed in one processing step by moving the milling tool.

[0029] Advantageously, a connection hole is formed on at least one of the instrument body parts, which connection hole has a hole longitudinal axis extending parallel or substantially parallel to the deburring longitudinal axis. This can be achieved in a simple manner if the reshaped instrument body part that is held for deburring is provided with a hole. Thus, in particular, a highly accurate alignment of the hole longitudinal axis relative to at least one deburring surface is achieved, which hole longitudinal axis in particular defines a pivot axis of the medical instrument comprising two instrument body parts. In particular, such an alignment clearly indicates that the medical instrument was formed according to the proposed method.

[0030] Preferably, at least two (in particular only two) instrument body parts are coupled to each other so as to be pivotable relative to the bore longitudinal axis. Thus, scissors, pliers, needle holders, clamps or the like can be formed in a simple manner.

[0031] In order to achieve the purpose of the pivotal connection of the two instrument body parts, it is advantageous if a common joint pin is inserted into the joint hole and is permanently connected to one of the two instrument body parts. In particular, the joint pin can be connected to one of the two instrument body parts in a force and / or positive-locking and / or material bonding manner. For example, the connection can be made by bonding or welding. Thus, in particular, a permanent and defined movable coupling of the two instrument body parts to each other can be achieved.

[0032] In order to minimize the risk of injury when handling the medical device, it is advantageous if at least one of the device body parts is polished. In particular, the polishing can be carried out by vibration grinding. Thus, the smallest edges and remaining burrs, in particular in the transition area to the at least one deburring surface, can be removed. In addition, the overall visual appearance of the medical device can be improved in this way.

[0033] In order to give the medical device a specific surface, it is advantageous if at least one device body part is blasted after polishing. In particular, the treatment can be performed by sandblasting or shot blasting.

[0034] Furthermore, the use of one of the methods described above for producing one of the medical devices described above is proposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] For further explanation, the preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. In these drawings:

[0036] Figure 1 : A schematic diagram showing an embodiment of punching out a blank of a device body component from a plate using a punching tool;

[0037] Figure 2 : shows along Figure 1 A cross-sectional view taken along line 2-2 in FIG.

[0038] Figure 3 : A schematic diagram showing an embodiment of an instrument body component reshaped from an instrument body component blank after removal from a mating forming tool;

[0039] Figure 4 : shows the process of inserting the blank of the device body component into the forming tool along the Figure 3 A cross-sectional view taken along line 4-4;

[0040] Figure 5 : shows a similar Figure 4 's view;

[0041] Figure 6 : Shows Figure 3 A plan view of an embodiment of the device body component depicted in FIG.

[0042] Figure 7 : Shows the Figure 6 A view of the device body component viewed in the direction of arrow A;

[0043] Figure 8 : shows after machine deburring using a milling tool to form a deburred surface Figure 6 and 7 A schematic diagram of the device body components;

[0044] Fig. 9 : shows along Figure 8 A cross-sectional view along the midline 9-9;

[0045] Fig.10 :Shows the through-closure frame and the connector hole on the instrument body after forming similar Fig. 9 A cross-sectional view of

[0046] Fig.11 : A schematic diagram showing a device body component during a polishing process after deburring; and

[0047] Fig.12 : An overall perspective view of an embodiment of a medical device having two device body components pivotally mounted to each other is shown. DETAILED DESCRIPTION

[0048] Fig.12 A general perspective view of an embodiment of a medical device 10 in the form of a towel clip 12 is schematically shown.

[0049] The instrument 10 comprises two instrument body parts 18 and 20 which are coupled to one another in the closed region 14 so as to be pivotable about a pivot axis 16 .

[0050] The closure area 14 is designed in the form of a push-in closure with a substantially cuboid closure frame 24 having a slit 22. On the closure frame 24, a joint pin 26, which passes through the slit 22 and is inserted into a joint hole 28, is immovably fixed to the closure frame 24, the longitudinal axis of which defines the pivot axis 16, and the joint hole 28 also defines the pivot axis.

[0051] A connector hole (not shown) is also formed on the closing portion 30 of the instrument body component 20. When the closing portion 30 passes through the slit 22, the connector pin 26 passes through the connector hole.

[0052] The instrument body parts 18 and 20 have deburred surfaces 32 and 34, respectively. All deburred surfaces 32 and 34 extend parallel to the pivot axis 16 and are thus perpendicular to the machining plane 36. The pivot axis 16 defines a normal 28 to the machining plane 36.

[0053] The distal ends of the instrument body parts 18, 20 form tool elements 40 and 42, respectively. In the case of a towel clamp, the tool elements are configured in the form of pointed tips facing each other. However, they can also be configured in the form of cutting edges or blunt gripping elements in order to configure an instrument in the form of scissors or blunt forceps or a needle holder.

[0054] Branches 44 and 46 extend in a proximal direction from closure region 14 to self-closing finger loops 48 and 50, respectively.

[0055] Directly at the distal ends of the finger loops 48 and 50 are locking elements 52 and 54, respectively, which are each toothed and together form a locking device 56 for holding the instrument in a defined closed state.

[0056] The deburring surface 34 in the region of the finger rings 48 and 50 is configured to be concavely curved away from the respective finger ring 48 or 50 and is a self-closing configuration. The radius of curvature of the deburring surface 34 varies continuously. Optionally, in Fig.12 The finger rings 48 and 50 having an elliptical shape in plan view in the illustrated embodiment may also have an annular structure and have a constant radius of curvature.

[0057] The surface areas 84 and 86 of the deburring surface 32 in the region of the branches 44 and 46 between the closing region 14 and the locking elements 52 and 54 are each of planar or substantially planar configuration and extend parallel or substantially parallel to one another at least in sections.

[0058] The deburring surface 32 in the region of the finger rings 48 and 50 is configured to be concavely curved away from the respective instrument body part 18 and 20 .

[0059] As already explained, each deburred surface 32 and 34 comprises one or more portions, all portions of the deburred surfaces 32 and 34 extending perpendicularly to the common machining plane 36 .

[0060] Combine the following Figures 1 to 12 The production of the device 10 is described in more detail.

[0061] The instrument body component blank 58 is reshaped to form the instrument body components 18 and 20 .

[0062] For example, Figure 1 An instrument body component blank 58 is shown punched or cut from a sheet of material 60 by punching or laser cutting, from which instrument body component 18 and instrument body component 20 may be formed.

[0063] Figure 2 A cross-sectional view of sheet 60 along line 2 - 2 is schematically shown, showing the cut device body component blank 58 .

[0064] An instrument body component blank 58 is formed to form one of the instrument body components 18 and 20 . Figure 3 Schematically shown are two forming tools 62 and 64, each having a receptacle 66 and 68 corresponding to the final contour, for forming the upper and lower halves of the instrument body components 18 and 20, respectively.

[0065] The device body component blank 58 is inserted into the receptacles 66 and 68 of the forming tools 62 and 64, which are then pressed toward each other. The device body component 18 is formed by cold forming the device body component blank 58 made of metal material and substantially has its final contour.

[0066] The forming tools 62 and 64 are designed so that, by being pressed together, they form the device body part 18 with burrs 70 protruding from all sides. The burrs 70 are oriented parallel to the machining plane 36.

[0067] Preferably, the cold forming is performed so that the burrs formed are self-sealing. Figure 6 Schematically shown in FIG. 1 are two burrs 70 of self-sealing configuration in the case of the instrument body part 18 .

[0068] The protruding burr 70 is removed, i.e., by milling. For this purpose, the instrument body part 18 is machined. A milling tool 72 is rotated about a deburring longitudinal axis 76 by a drive 74. The drive 74 is controlled by a control device 78 connected to the drive 74 in a control operation so that the drive 74 moves the milling tool 72 in a desired manner. The drive 74 moves the milling tool 72 on the instrument body part 18 in a defined, predetermined manner in order to remove the protruding burr 70.

[0069] During the deburring process, the milling tool 72 is moved in such a way that the deburring longitudinal axis 76 is always oriented perpendicularly to the machining plane 36. This orientation of the deburring longitudinal axis 76 relative to the machining plane 36 is maintained throughout the deburring process.

[0070] During the deburring process, Figure 8 The schematically shown holding device 80 holds the instrument body part 18. In this way, the orientation or alignment of the deburring longitudinal axis 76 relative to the instrument body part 18 can be maintained in a simple manner.

[0071] After the burr 70 has been removed by means of the milling tool 72 , not only the burr 70 but also a part of the device body part 18 is removed in order to form the deburred surfaces 32 and 34 which are oriented perpendicularly to the machining plane 36 in the manner described.

[0072] The device body part 18 held by the holding device 80 is arranged in the region of the closing frame 24 which has the connection opening 28 oriented perpendicularly to the processing plane 36. Furthermore, the slot 22 oriented parallel to the processing plane 36 is formed.

[0073] As in Fig.10 As can be easily seen in FIG. 1 , the deburring surface 32 extends parallel to the pivot axis 16 . This is directly attributable to the orientation of the milling tool 71 with its deburring longitudinal axis 76 .

[0074] The instrument body part 18 may be selectively polished, as Fig.11 To this end, Fig.11 A polishing tool 82 is shown, with which non-circular transitions produced on the device body part 18 due to deburring are rounded.

[0075] In addition to polishing using the polishing tool 82, the deburred instrument body part 18 may also be polished by vibration grinding in a vibration grinding device.

[0076] The instrument body parts 18 and 20 can then be subjected to a blasting treatment, for example by sandblasting or shot blasting, so that the instrument body parts 18 and 20 have a defined aesthetic surface.

[0077] The constructed instrument body components 18 and 20 are then connected to the joint pin 26 as initially explained to form the instrument 10.

[0078] In this way, different medical instruments can be formed, such as scissors, clips, needle clamps, or forceps. These instruments are configured with corresponding tool elements for the respective intended purpose.

[0079] The manufacturing method described enables almost complete production of the device 10 entirely by machine. In particular, a CNC milling machine can be used to deburr the device body parts 18 and 20 after they are formed from the device body part blank 58. This enables high reproducibility of the device 10, thereby achieving a consistently high quality.

[0080] The manufacturing method described in particular enables a safe identification of the instrument 10 constructed according to the method. Due to the processing by machine, the alignment of the pivot axis 16 relative to the deburred surfaces 32 and 34 can be achieved in a highly precise manner, which is not possible in particular by manually guided processing steps (such as manually guided strip grinding of the reshaped instrument body part blank 58 for removing burrs 70).

[0081] The removal of the burr 70 described above is carried out using a milling tool 72 designed in the form of a peripheral milling cutter. In principle, the deburring surfaces 32 and 34 can also be formed using a milling tool 62 in the form of an end mill. However, the end mill is not oriented perpendicularly to the machining plane 36 with the longitudinal deburring axis 76, but parallelly. The end mill is therefore rotated about an axis parallel to the machining plane 36, in particular an axis located in the machining plane 36. In this case, a longitudinal deburring axis 76 can also be defined, parallel to which all the deburring surfaces 32 and 34 on the device 10 extend and which is oriented perpendicularly to the machining plane 36.

[0082] Reference numerals list

[0083] 10 Medical Devices

[0084] 12 Towel Clip

[0085] 14 Closed Area

[0086] 16 Pivot axis

[0087] 18. Instrument body parts

[0088] 20 Device body parts

[0089] 22 Slit

[0090] 24 Closed Frame

[0091] 26 Connector pin

[0092] 28 Connector hole

[0093] 30 Closure

[0094] 32 Deburred surface

[0095] 34 Deburred surface

[0096] 36 Machining plane

[0097] 38 Normal

[0098] 40 Tool elements

[0099] 42 Tool elements

[0100] 44 branches

[0101] 46 branches

[0102] 48 Ring

[0103] 50 Ring

[0104] 52 Locking element

[0105] 54 Locking element

[0106] 56 Locking element

[0107] 58 Instrument body component blank

[0108] 60 Plate

[0109] 62 Forming tools

[0110] 64 Forming tools

[0111] 66 Container

[0112] 68 Containers

[0113] 70 Burr

[0114] 72 Milling tools

[0115] 74 Driver

[0116] 76 Deburring longitudinal axis

[0117] 78 Control Device

[0118] 80 Holding device

[0119] 82 Polishing tools

[0120] 84 Face

[0121] 86 Face

Claims

1. A medical device (10) having at least one device body component (18, 20), wherein the at least one device body component (18, 20) is manufactured by forming a device body component blank (58), characterized in that: The at least one instrument body part (18, 20) has at least one deburring surface (32, 34) formed by milling, wherein the at least one deburring surface (32, 34) includes one or more parts, wherein each part of the at least one deburring surface (32, 34) extends perpendicular to a common machining plane (36), wherein a normal (38) to the machining plane (36) defines a deburring longitudinal axis (76), wherein the at least one deburring surface (32, 34) extends parallel to the deburring longitudinal axis (76), wherein the medical instrument (10) forms scissors, forceps, needle holder or clamps and comprises two instrument body parts (18, 20), wherein the two instrument body parts (18, 20) are mounted to be pivotable relative to each other about a pivot axis (16), wherein the pivot axis (16) defines the deburring longitudinal axis (76).

2. The medical device according to claim 1, characterized in that: The at least one deburring surface (34) is of self-sealing construction.

3. The medical device according to claim 1, characterized in that: The at least one deburring surface (32, 34) is configured to be planar in sections and / or to be convexly curved away from the at least one instrument body component (18, 20) in sections and / or to be concavely curved away from the at least one instrument body component (18, 20).

4. The medical device according to claim 3, characterized in that: The at least one deburring surface (32, 34) curved in sections is configured to be curved in only one dimension, wherein the radius of curvature of the deburring surface (32, 34) is defined only relative to the deburring longitudinal axis (76).

5. The medical device according to claim 4, characterized in that: The radius of curvature is constant in the section or varies continuously in the section along the extension of the at least one deburring surface (32, 34).

6. The medical device according to claim 1, characterized in that: At least two face portions (84, 86) of the at least one deburring surface (32, 34) extend parallel or substantially parallel to each other.

7. The medical device according to any one of claims 1 to 6, characterized in that: The at least one instrument body component (18, 20) a) is formed from a device body component blank (58) by cold forming; and / or b) is polished to shape; and / or c) is injection molded; and / or d) is made of metal material.

8. The medical device according to claim 1, characterized in that: The at least one deburred surface (32, 34) is formed by machine milling.

9. The medical device according to claim 7, characterized in that: The at least one instrument body component (18, 20) a) is polished by vibratory grinding; and / or b) is sandblasted or shot peened; and / or c) is made of tool steel.

10. A method for manufacturing a medical device (10), the medical device comprising at least one device body component (18, 20), in which a device body component blank (58) is reshaped and burrs (70) generated during the shaping process are removed, characterized in that: The invention relates to a method for removing burrs (70) by milling, wherein at least one device body part (18, 20) is held during the milling process, wherein in order to remove the burrs (70), a milling tool (72) is rotated about a longitudinal deburring axis (76), and in order to form at least one burr surface (32, 34), the milling tool (72) is moved in a machining plane (36), the normal (38) of which defines the longitudinal deburring axis (76), without changing the longitudinal deburring axis (76). 6) Alignment relative to the processing plane (36), wherein a connector hole (28) having a hole longitudinal axis (16) is formed on at least one instrument body part (18, 20), and the hole longitudinal axis (16) extends parallel to or essentially parallel to the deburring longitudinal axis (76), wherein at least two instrument body parts (18, 20) are coupled to each other so as to be pivotable relative to each other about the hole longitudinal axis (16), and the medical instrument (10) is produced in the form of scissors, forceps, needle holder or clamps.

11. The method according to claim 10, characterized in that The removal of the burrs (70) is carried out in a computer-controlled manner.

12. The method according to claim 10, characterized in that During the process of removing the burr (70), a portion of the instrument body component (18) is also removed to form the at least one deburred surface (32, 34).

13. The method according to claim 10, characterized in that The device body component blank (58) a) is made of a sheet material (60) by punching or cutting; and / or b) is made of metal material, and / or c) is reshaped by cold forming; and / or d) reshaping to form a final contour of the at least one instrument body part (18, 20), the formed burr (70) protruding from the final contour.

14. The method according to claim 10, characterized in that At least one continuous burr (70) is formed during the forming process of the device body component blank (58).

15. The method according to claim 10, characterized in that In order to pivotally connect the two instrument body parts (18, 20), a common hinge pin (26) is inserted into the joint hole (28) of the two instrument body parts (18, 20) and permanently connected to one of the two instrument body parts (18, 20).

16. The method according to any one of claims 10 to 15, characterized in that The at least one instrument body component (18, 20) is polished.

17. The method according to claim 10, characterized in that The burrs (70) are generated due to tolerances and process fluctuations.

18. The method according to claim 10, characterized in that The burrs (70) are removed by machine milling.

19. The method according to claim 10, characterized in that Only two instrument body parts (18, 20) are coupled to each other so as to be pivotable relative to each other about the bore longitudinal axis (16).

20. The method according to claim 13, characterized in that The device body component blank (58) a) is made from a sheet (60) by laser cutting; and / or b) is made of tool steel.

21. The method according to claim 15, characterized in that The common hinge pin (26) is permanently connected to one of the two device body parts (18, 20) by force and / or positive locking and / or material bonding.

22. The method according to claim 15, characterized in that The common hinge pin (26) is permanently connected to one of the two device body parts (18, 20) by bonding or welding.

23. The method according to claim 16, characterized in that The at least one instrument body component (18, 20) is polished by vibration grinding.

24. The method according to claim 16, characterized in that The at least one instrument body component (18, 20) a) polished after all burrs (70) have been removed, and / or b) Blasting after polishing.

25. The method according to claim 24, characterized in that The at least one device body part (18, 20) is blasted by sandblasting or shot blasting after polishing.

26. Use of the method according to any one of claims 10 to 25 for producing a medical device (10) according to any one of claims 1 to 9.

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