A spooling fixture and turning apparatus

Abstract

This utility model belongs to the field of turning technology and discloses a bar jig. The bar jig includes a support sleeve, a pressure plate, and fasteners. The support sleeve has a receiving cavity inside, and the fixed section of the bar can be placed in the receiving cavity with its first side wall abutting against a portion of the cavity wall. The pressure plate can be placed at least partially in the receiving cavity and abutting against its second side wall. The fasteners can pass through the side wall of the support sleeve along a second direction to abut against the side of the pressure plate away from the second side wall, thereby applying force to the pressure plate along the second direction to fix the fixed section in the receiving cavity. This bar jig provides full circumferential radial support for the fixed section of the bar, thereby realizing the clamping of the bar. Furthermore, this bar jig, through full circumferential radial support, not only provides stable locking to prevent the bar from loosening, but also significantly increases the radial stiffness of the bar, preventing the bar from bending during subsequent processing.

Description

Technical Field

[0001] This utility model relates to the field of turning technology, and in particular to a bar jig and turning equipment. Background Technology

[0002] Zone melting, also known as zone refining, is one of the main methods for purifying metals and semiconductors. A typical zone melting method involves forming the material to be purified into thin rods, heating them until the solid melts into a liquid state. The temperature of the liquid phase in the molten zone is only a few degrees higher than the melting point of the solid material. Upon slight cooling, a solid phase precipitates. Because the presence of impurities generally lowers the melting point of pure substances, the portion containing impurities in the molten zone is more difficult to solidify, while the higher-purity portion solidifies more easily. Therefore, the purity of the precipitated solid phase is higher than that of the liquid phase, resulting in a semi-circular bar-shaped metal ingot, or simply a bar. During zone melting, impurity elements accumulate at one end and on the surface of the bar. To further obtain ultrapure metal, the surface of the bar needs to be cold-worked to remove surface impurities.

[0003] Turning is a machining method that uses the rotational motion of the workpiece and the linear or curvilinear motion of the cutting tool to polish a blank. Current technology typically uses turning to cold-work the outer cylindrical surface of a bar ingot. The bar ingot needs to be clamped in a fixture and rotated. However, due to the high purity and softness of the bar ingot, its radial stiffness is insufficient, making ordinary fixtures unable to meet the clamping requirements. This can easily lead to bar bending and even the risk of tool breakage. Furthermore, the bar ingot's semi-cylindrical shape, with both semi-circular and flat surfaces, makes it difficult for ordinary fixtures to find suitable contact points and provide radial support and fixation, potentially resulting in insecure clamping or damage to the bar ingot.

[0004] Therefore, there is an urgent need for a bar jig that can solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a bar clamp and turning equipment that can stably hold bar bars.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A bar jig, the bar comprising a processing section and a fixing section arranged and extending along a first direction, the fixing section comprising a first sidewall and a second sidewall arranged along a second direction, the bar jig comprising:

[0008] A support sleeve extends along the first direction and has an internal receiving cavity. The fixed section of the strip can be placed in the receiving cavity, and the first sidewall can fit against a portion of the cavity wall.

[0009] A pressure plate extending along the first direction, the pressure plate being at least partially capable of being placed within the receiving cavity for abutting against the second sidewall;

[0010] Fastener, the fastener being able to pass through the side wall of the support sleeve along the second direction and abut against the side of the pressure plate opposite to the second side wall, thereby being able to apply force to the pressure plate along the second direction to fix the fixing section in the receiving cavity;

[0011] The first direction and the second direction are set at an angle.

[0012] Preferably, the side wall of the support sleeve is provided with a connecting through hole extending axially along the second direction. The connecting through hole communicates with the receiving cavity. After the fastener passes through the connecting through hole, the end of the fastener enters the receiving cavity and abuts against the pressure plate.

[0013] Preferably, at least two connecting through holes are provided, and the at least two connecting through holes are spaced apart along the first direction; at least two fasteners are provided, and the fasteners are provided in a one-to-one correspondence with the connecting through holes.

[0014] Preferably, the fastener is threadedly connected to the connecting through hole.

[0015] Preferably, the pressure plate is provided with a limiting groove on the side facing the fastener, and when the fastener abuts against the pressure plate, the end of the fastener is placed in the limiting groove.

[0016] Preferably, the limiting groove is a conical groove, and the end of the fastener facing the pressure plate is a conical tip.

[0017] Preferably, the support sleeve is provided with an end opening, the end opening is in communication with the receiving cavity, and the fixed section of the bar is placed in the receiving cavity from the end opening.

[0018] Preferably, the end face of the fixing segment in the first direction is semi-circular, and its diameter matches the diameter of the receiving cavity.

[0019] Preferably, the length of the processing section in the first direction is greater than that of the fixed section, and the length of the support sleeve in the first direction is equal to that of the fixed section.

[0020] Turning equipment, including the aforementioned bar jig.

[0021] The beneficial effects of this utility model are:

[0022] This utility model proposes a bar jig, in which the bar includes a processing section and a fixing section arranged and extending along a first direction. The fixing section includes a first sidewall and a second sidewall. Specifically, the bar jig includes a support sleeve, a pressure plate, and fasteners. The support sleeve also extends along the first direction and has an internal receiving cavity. The fixing section of the bar can be placed in the receiving cavity, and the first sidewall is in contact with a portion of the cavity wall. The pressure plate also extends along the first direction and at least a portion of it can be placed in the receiving cavity and is in contact with the second sidewall. The fasteners can pass through the sidewall of the support sleeve along a second direction to abut against the side of the pressure plate away from the second sidewall, thereby applying force to the pressure plate along the second direction to fix the fixing section in the receiving cavity. The first direction and the second direction are arranged at an angle. The fixed section of the bar is secured by the bar clamp, while the processing section protrudes for machining. Specifically, after the fixed section of the bar enters the receiving cavity, its first sidewall fits against the cavity wall, and its second sidewall fits against the pressure plate. Fasteners can apply force to the pressure plate in the second direction to fix the fixed section in the receiving cavity. This bar clamp provides full circumferential radial support for the fixed section of the bar, thereby achieving bar clamping. Furthermore, this bar clamp, through full circumferential radial support, not only provides stable locking to prevent the bar from loosening, but also significantly increases the radial stiffness of the bar, preventing the bar from bending during subsequent processing.

[0023] On the other hand, this utility model also proposes a turning equipment, including the above-mentioned bar jig, which can perform turning processing on the bar jig fixed by the bar jig and has high safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the bar clamp proposed in this utility model;

[0025] Figure 2 yes Figure 1 Sectional view at point A in the middle.

[0026] In the picture:

[0027] 1. Support sleeve; 11. Receiving cavity; 12. Connecting through hole; 13. End opening; 2. Pressure plate; 21. Limiting groove; 3. Fastener; 10. Strip; 101. Processing section; 102. Fixing section; 1021. First side wall; 1022. Second side wall. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] During zone melting, the shape of the precipitated solid depends primarily on the shape and movement of the molten zone. Typically, the molten zone is a narrow area where the liquid phase gradually solidifies into a long, thin solid phase. The precipitated solid is usually semi-cylindrical, meaning the resulting ingot 10 has a semi-cylindrical appearance, specifically a semi-circular cross-section. To remove surface impurities, the ingot 10 needs further grinding. Since turning can machine complex curved surfaces, it is often used to grind the curved sidewalls of the ingot 10. During grinding, a clamp is needed to hold and fix the ingot 10, causing it to rotate. However, due to the softness and insufficient radial stiffness of the ingot 10, ordinary clamps cannot meet the clamping requirements, easily leading to bending of the ingot 10 and even the risk of tool breakage. Moreover, due to the unique appearance of the ingot 10, ordinary clamps struggle to find suitable contact points, failing to provide radial support and fixation, potentially resulting in insecure clamping or damage to the ingot 10. Therefore, there is an urgent need for a bar jig that can solve the above-mentioned technical problems.

[0033] This utility model proposes a bar billet clamp, referring to... Figure 1 and Figure 2 The bar jig proposed in this embodiment will be described.

[0034] Specifically, refer to Figure 1 The bar 10 includes a processing section 101 and a fixing section 102 arranged and extending along a first direction. The fixing section 102 includes a first sidewall 1021 and a second sidewall 1022 arranged along a second direction. The bar clamp includes a support sleeve 1, a pressure plate 2, and a fastener 3. The support sleeve 1 also extends along the first direction and has a receiving cavity 11 inside. The fixing section 102 of the bar 10 can be placed in the receiving cavity 11, and the first sidewall 1021 is in contact with a portion of the cavity wall of the receiving cavity 11. The pressure plate 2 also extends along the first direction. At least part of the pressure plate 2 can be placed in the receiving cavity 11 and is in contact with the second sidewall 1022. The fastener 3 can pass through the sidewall of the support sleeve 1 along the second direction to abut against the side of the pressure plate 2 away from the second sidewall 1022, thereby applying force to the pressure plate 2 along the second direction to fix the fixing section 102 in the receiving cavity 11. The first direction and the second direction are arranged at an angle. It is understood that the first direction is the axial direction of the bar 10, the second direction is the radial direction of the bar 10, and the support sleeve 1 is the same as the extension direction of the bar 10, i.e., the axial direction.

[0035] The fixed section 102 of the bar 10 is used to fix it in the bar 10 fixture, while the processing section 101 protrudes for machining. In other words, the support sleeve 1 divides the bar 10 into the processing section 101 and the fixed section 102. Specifically, after the fixed section 102 of the bar 10 enters the receiving cavity 11, its first sidewall 1021 fits against the cavity wall of the receiving cavity 11, and its second sidewall 1022 fits against the pressure plate 2. The fastener 3 can apply force to the pressure plate 2 in the second direction to fix the fixed section 102 in the receiving cavity 11. This bar 10 fixture provides full circumferential radial support for the fixed section 102 of the bar 10, thereby realizing the clamping of the bar 10. Furthermore, this bar 10 fixture can not only provide stable locking by full circumferential radial support to prevent the bar 10 from loosening, but also greatly increase the radial stiffness of the bar 10, avoiding bending of the bar 10 during subsequent processing.

[0036] It is understood that the first sidewall 1021 of the fixed section 102 in the bar 10 is a curved sidewall in a semi-cylinder, and the second sidewall 1022 is a straight sidewall. During the clamping process of the bar 10, the fixed section 102 of the bar 10 is inserted into the receiving cavity 11 of the support sleeve 1 along the first direction (i.e., axial direction). At this time, the first sidewall 1021 of the bar 10 is tightly fitted with part of the cavity wall of the receiving cavity 11, forming a preliminary radial positioning. This fit utilizes the rigid structure of the receiving cavity 11 to provide initial radial support and prevent the bar 10 from shaking or shifting during clamping. The pressure plate 2 extends along the first direction, partially inserts into the receiving cavity 11, and fits against the second sidewall 1022 of the bar 10, providing uniform radial pressure, filling the gap between the second sidewall 1022 and the cavity wall, and ensuring that the bar 10 has no loosening space in the radial direction. The fastener 3 passes through the side wall of the support sleeve 1 along the second direction (i.e. radial) and abuts against the side of the pressure plate 2 away from the second side wall 1022, applying force to the pressure plate 2 and pushing the pressure plate 2 to move towards the bar 10, generating a radial clamping force, which forces the second side wall 1022 of the bar 10 to form double-sided clamping between the pressure plate 2 and the first side wall 1021 and the cavity wall, thereby fixing the fixed section 102 in the receiving cavity 11, and thus achieving stable clamping of the bar 10 by the bar clamp.

[0037] Furthermore, the side wall of the support sleeve 1 is provided with a connecting through hole 12 extending axially in the second direction. The connecting through hole 12 communicates with the receiving cavity 11. After the fastener 3 passes through the connecting through hole 12, the end of the fastener 3 enters the receiving cavity 11 and abuts against the pressure plate 2. After the fastener 3 passes through the connecting through hole 12, it can apply radial force to the pressure plate 2, thereby achieving the clamping of the fixed section 102 of the bar 10.

[0038] Specifically, at least two connecting through holes 12 are provided, and these at least two connecting through holes 12 are spaced apart along the first direction. Correspondingly, at least two fasteners 3 are also provided, with each fastener 3 corresponding to a connecting through hole 12. This allows multiple fasteners 3 spaced apart along the first direction to form continuous contact points with the pressure plate 2, thereby creating continuous force application points. This ensures continuous force application points on the fixed section 102 of the bar 10, preventing localized deformation of the bar 10 due to single-point force. In this embodiment, three connecting through holes 12 are provided. In other embodiments, the number of connecting through holes 12 can be adjusted appropriately according to the actual length of the bar 10, and this is not limited here.

[0039] To ensure the uniformity of the pressure exerted by the fastener 3 on the pressure plate 2, at least two connecting through holes 12 are evenly spaced along the first direction, that is, the distance between any two adjacent connecting through holes 12 is equal.

[0040] Furthermore, the fastener 3 and the connecting through hole 12 are connected by threads. Threads are provided on the wall of the connecting through hole 12, and corresponding threads are provided on the side peripheral wall of the fastener 3. First, the fastener 3 is placed in the connecting through hole 12, and then the fastener 3 is tightened to move the fastener 3 along the second direction until the end of the fastener 3 abuts against the pressure plate 2 and applies appropriate pressure to the fixed section 102 of the bar 10. At this point, the clamping force of the fastener 3 is provided. This threaded connection has self-locking capability and precise fine-tuning capability. When the fastener 3 moves into place in the connecting through hole 12, simply stop tightening; no other locking components are needed. The fastener 3 is locked by the threaded engagement and will not move up and down along the second direction, achieving a more precise, reliable, and durable radial clamping effect. Of course, in other embodiments, the connecting through hole 12 can also be a smooth hole with a nut fixed inside, and the fastener 3 is threadedly connected to the nut. This is not limited here.

[0041] Furthermore, to ensure that the fastener 3 does not completely enter the receiving cavity 11, causing the connection between the fastener 3 and the side wall of the support sleeve 1 to detach, a shoulder is provided at the end of the fastener 3 away from the pressure plate 2. The shoulder can interfere with the area around the connecting through hole 12 on the side wall of the support sleeve 1, thereby improving connection safety. In this embodiment, the fastener 3 is a countersunk hexagonal set screw.

[0042] A limiting groove 21 is provided on the side of the pressure plate 2 facing the fastener 3. When the fastener 3 abuts against the pressure plate 2, the end of the fastener 3 is placed in the limiting groove 21, and the two are mutually constrained. The setting of the limiting groove 21 can avoid the slippage problem when the end face of the fastener 3 contacts the plane of the pressure plate 2. Traditional plane contact may produce micro-displacement under vibration, but the mutual constraint between the limiting groove 21 and the end of the fastener 3 can completely eliminate this risk.

[0043] Furthermore, the limiting groove 21 is a conical groove, and the end of the fastener 3 facing the pressure plate 2 is a conical tip. The engagement of the conical tip and the conical groove has a self-centering effect. Specifically, when the conical tip engages with the conical groove, it can automatically guide the end of the fastener 3 into the center position of the conical groove, reducing manual or mechanical alignment errors. Even if there is a slight deviation in the initial position, the slope of the conical groove will force the tip to slide into the correct position.

[0044] In addition, the support sleeve 1 is provided with an end opening 13, which is connected to the receiving cavity 11. The fixed section 102 of the strip 10 is placed in the receiving cavity 11 from the end opening 13, and the pressure plate 2 also enters the receiving cavity 11 from the end opening 13.

[0045] The fixed section 102 has a semi-circular end face in the first direction, and its diameter matches the diameter of the receiving cavity 11. This ensures that when the fixed section 102 of the bar 10 is placed in the receiving cavity 11, the fixed section 102 of the bar 10 is coaxial with the support sleeve 1, forming a stable integral rotating body. It is understood that after the bar 10 is clamped, the bar chuck needs to drive it to rotate so that the cutting tool can process the first sidewall 1021 of the bar 10. Therefore, the bar chuck needs to be coaxially positioned with the bar 10 to prevent radial runout during rotation, allowing the cutting tool to complete the grinding process on the processing section 101.

[0046] The length of the processing section 101 in the first direction is greater than that of the fixed section 102, and the length of the support sleeve 1 in the first direction is equal to that of the fixed section 102. It can be understood that the support sleeve 1 divides the bar 10 into the processing section 101 and the fixed section 102. When the bar 10 is held by the bar chuck, the fixed section 102 is placed inside the support sleeve 1, and the processing section 101 extends out of the end opening 13 of the support sleeve 1 and is placed outside the support sleeve 1 for subsequent processing and grinding. After the processing section 101 is ground, the bar 10 needs to be turned around and held to complete the grinding of the curved sidewall of the entire bar 10. Therefore, the length of the processing section 101 in the first direction should be slightly greater than that of the fixed section 102. When the bar 10 is turned around and clamped, the processing section 101 at this time overlaps with the processing section 101 before it is turned around, thus ensuring that the entire curved sidewall of the bar 10 is ground, in order to avoid the defect that the area near the center of the bar 10 cannot be processed when the length of the processing section 101 in the first direction is less than or equal to that of the fixed section 102.

[0047] Of course, the lengths of the processing section 101 and the fixed section 102 in the first direction should not differ too much to balance the support and overhang of the bar 10, effectively reduce the shaking problem during processing, and avoid the radial runout and unbalanced centrifugal force problems caused by a large difference in length between the processing section 101 and the fixed section 102. In this embodiment, the length of the processing section 101 in the first direction is 5-10 mm longer than that of the fixed section 102. The length of the support sleeve 1 corresponds to that of the fixed section 102 in the first direction, that is, the lengths of the support sleeve 1 and the fixed section 102 are equal, while the length of the fixed section 102 is slightly shorter than that of the processing section 101. Therefore, the length of the support sleeve 1 is slightly less than half the length of the bar 10, and the fixed section 102 can be placed exactly inside the receiving cavity 11, which can ensure the clamping stability of the bar 10.

[0048] Furthermore, the length of the pressure plate 2 is equal to or slightly shorter than that of the strip 10 in the first direction. This ensures that the pressure plate 2 can fully adhere to the second sidewall 1022 of the fixed section 102 in the first direction, and that the overall length of the pressure plate 2 and the strip 10 in the first direction is equal. In other words, the pressure plate 2 adheres to both the processing section 101 and the fixed section 102 of the strip 10, preventing stress points from forming between the processing section 101 and the fixed section 102 due to the pressure plate 2 only adhering to the fixed section 102, which could lead to breakage between the processing section 101 and the fixed section 102. The pressure plate 2 is made of a high-strength and high-rigidity material.

[0049] In addition, the side of the pressure plate 2 closest to the fastener 3 can be an arc-shaped surface to accommodate the cylindrical receiving cavity 11 while increasing the maximum thickness of the pressure plate 2, making it easier to abut against the fastener 3.

[0050] The usage process of this spindle clamp is as follows:

[0051] First, insert the bar 10 into the support sleeve 1 through the end opening 13, so that the fixing section 102 is located in the receiving cavity 11 and the first side wall 1021 is in contact with part of the cavity wall of the receiving cavity 11. Then, insert the pressure plate 2 into the support sleeve 1 through the end opening 13, so that it is at least partially located in the receiving cavity 11 and is in contact with the second side wall 1022. Then, screw the fastener 3 into the connecting through hole 12, so that the fastener 3 abuts against the side of the pressure plate 2 away from the second side wall 1022 and applies appropriate pressure to the pressure plate 2 along the second direction. At this time, the fixing section 102 is fixed in the receiving cavity 11 and the bar 10 is clamped on the bar clamp.

[0052] On the other hand, this embodiment also proposes a turning device, including the aforementioned bar jig, which can perform turning operations on the bar 10 fixed by the bar jig, and has high safety. Further, the turning device includes a mounting device, a cutting tool, and the aforementioned bar jig. The bar jig can be installed in the mounting device, which provides driving force to the bar jig, driving the bar jig to rotate, thereby causing the bar 10 to rotate. The cutting tool grinds the machining section 101 of the bar 10. It is understood that before machining, the machining section 101 and the fixed section 102 of the bar 10 are structurally identical except for their length in the first direction. After the cutting tool finishes machining the machining section 101, the bar 10 can be repositioned, thereby enabling grinding of the entire curved sidewall of the bar 10.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bar jig, the bar (10) comprising a processing section (101) and a fixing section (102) arranged and extending along a first direction, the fixing section (102) comprising a first sidewall (1021) and a second sidewall (1022) arranged along a second direction, characterized in that, The bar clamp includes: A support sleeve (1) extends along the first direction and has an internal cavity (11). The fixed section (102) of the strip (10) can be placed in the cavity (11), and the first sidewall (1021) can fit against a portion of the cavity wall of the cavity (11). Pressure plate (2), the pressure plate (2) extends along the first direction, the pressure plate (2) is at least partially able to be placed in the receiving cavity (11) for abutting against the second side wall (1022); Fastener (3) can pass through the side wall of the support sleeve (1) in the second direction and abut against the side of the pressure plate (2) away from the second side wall (1022), thereby applying force to the pressure plate (2) in the second direction to fix the fixing section (102) in the receiving cavity (11). The first direction and the second direction are set at an angle.

2. The bar clamp of claim 1, wherein The side wall of the support sleeve (1) is provided with a connecting through hole (12) extending axially in the second direction. The connecting through hole (12) communicates with the receiving cavity (11). After the fastener (3) passes through the connecting through hole (12), the end of the fastener (3) enters the receiving cavity (11) and abuts against the pressure plate (2).

3. The bar clamp of claim 2, wherein, At least two connecting through holes (12) are provided, and the at least two connecting through holes (12) are spaced apart along the first direction; at least two fasteners (3) are provided, and the fasteners (3) are provided in a one-to-one correspondence with the connecting through holes (12).

4. The bar clamp of claim 2, wherein, The fastener (3) is threadedly connected to the connecting through hole (12).

5. The bar clamp according to any one of claims 1-4, characterized in that The pressure plate (2) is provided with a limiting groove (21) on the side facing the fastener (3). When the fastener (3) abuts against the pressure plate (2), the end of the fastener (3) is placed in the limiting groove (21).

6. The bar clamp of claim 5, wherein, The limiting groove (21) is a conical groove, and the end of the fastener (3) facing the pressure plate (2) is a conical tip.

7. The bar clamp according to any one of claims 1-4, characterized in that The support sleeve (1) is provided with an end opening (13), which is connected to the receiving cavity (11). The fixed section (102) of the strip (10) is placed in the receiving cavity (11) from the end opening (13).

8. The bar clamp of any one of claims 1-4, wherein, The end face of the fixed segment (102) in the first direction is semi-circular, and its diameter matches the diameter of the receiving cavity (11).

9. The bar clamp of any of claims 1-4, wherein, The length of the processing section (101) in the first direction is greater than that of the fixed section (102), and the length of the support sleeve (1) is equal to that of the fixed section (102) in the first direction.

10. Turning apparatus, characterized in that Includes the bar clamp as described in any one of claims 1-9.

Images