Elastic clamping tool for clamping cylindrical parts

Abstract

The elastic clamping tool comprises a connecting plate, a bottom plate is fixed to the connecting plate, an elastic chuck is installed on the bottom plate, the elastic chuck comprises a containing cavity used for containing a workpiece to be machined, the elastic chuck is divided into a left half part and a right half part through a separation groove, and the left half part and the right half part are arranged on the left half part and the right half part respectively. The left half part and the right half part are connected through a locking screw, and the containing cavity clamps the workpiece to be machined. According to the device, the cylindrical to-be-machined part is clamped through the two-half type elastic chuck, the outer circle of the to-be-machined part can be prevented from being damaged by clamping, meanwhile, the whole elastic chuck is convenient to disassemble, assemble and replace, and the device is suitable for to-be-machined parts of different sizes and specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of local improvement design of machine tool fixtures, in particular to an elastic clamping fixture for clamping cylindrical parts. Background Art

[0002] The existing CNC (CNC machining center) fixtures on the market are mainly flat-jaw vises. When clamping cylindrical parts, flat-jaw vises are prone to scratching the part surface, affecting the surface quality of the machined workpiece. Processing arc profiling on the vise pad can avoid scratching, but the vise does not have a locating pin, and the profiling block cannot be accurately positioned the next time it is used.

[0003] The top end of the linkage is fixed with a first gear, and the outer end of the linkage is fixed with a first gear, and the outer end of the first gear is meshed with a plurality of second gears.

[0004] The patent with announcement number CN221696065U discloses a clamping tool for turning and grinding machine tools, which is used in the field of machine tool fixtures, including a mounting seat, a bottom of which is provided with a groove body; the utility model has a groove body on the mounting seat, and a screw rod is installed inside the groove body, which cooperates with the first bevel gear inside the connecting groove and the second bevel gear on the screw rod. When one screw rod is rotated, the three screw rods rotate synchronously, so that under the action of the connecting block, the three connecting seats rotate at the same time to achieve the purpose of synchronous movement. The overall structure is simple, the production cost is low, and the processing is convenient. By installing a limiting block on the connecting seat, the three limiting blocks can clamp the hexagonal nut workpiece, and the limiting block is processed with tooth grooves, which can clamp the gear-shaped workpiece, and cooperate with the arc surface opened on the connecting seat and the limit block to clamp the cylinder or round tube, thereby improving the overall applicability and convenience.

[0005] In the above technical solution, the fixture applies forces to the workpiece from three directions simultaneously to achieve the purpose of synchronous movement. The overall structural design must meet the requirements of stable and reliable synchronous operation. The overall structural design is complex, the processing is difficult, and the processing cost is high.

[0006] In order to solve one of the above problems, the present application provides an elastic clamping tool for clamping cylindrical parts. Utility Model Content

[0007] The purpose of the utility model is to solve the problems existing in the prior art, and to propose an elastic clamping tool for clamping cylindrical parts. The cylindrical workpiece to be processed is clamped by a two-half elastic collet, which can avoid the outer circle of the workpiece to be processed from being clamped. At the same time, the entire elastic collet is easy to disassemble and replace, and can adapt to workpieces of different sizes and specifications.

[0008] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: an elastic clamping tool for clamping cylindrical parts, comprising a connecting plate, a base plate fixed to the connecting plate, and the two are generally connected and fastened by multiple bolts, an elastic collet is installed on the base plate, the position of the elastic collet is generally limited and the two are connected and fastened by multiple bolts, the elastic collet comprises a receiving cavity for accommodating a workpiece to be processed, the overall shape of the receiving cavity is a circular hole structure, and the workpiece to be processed is a cylindrical part, so that the workpiece to be processed can be placed in the receiving cavity, the elastic collet is separated by a dividing groove to form a left half and a right half, the left half and the right half are connected by a locking screw so that the receiving cavity clamps the workpiece to be processed, the locking screw is generally rotated by a tool so that the left half and the right half are close to each other, and the receiving cavity can be contracted inward to achieve the purpose of clamping the workpiece to be processed, because the contour of the receiving cavity is close to the outer circumferential shape of the workpiece to be processed, the contact surface area between the two can be maximized, that is, the force-bearing area of ​​the workpiece to be processed is large, and it will not be easily clamped and its surface quality will be affected.

[0009] Furthermore, the elastic collet as described above includes a main body, a receiving cavity is machined on the top of the main body, and a step position is provided on the bottom of the main body. The overall shape of the main body can be obtained by machining to facilitate subsequent processing and positioning.

[0010] Furthermore, the main body as described above is fixed to the base plate by screwing screws at the step position, and is generally fastened by bolts.

[0011] Furthermore, the accommodating cavity as described above is a blind hole processed on the main body. Since the diameter of the blind hole is large, it is generally obtained by milling. The separating groove is a groove body processed downward along the center line of the top of the main body. The size parameters of the separating groove are selected according to actual processing.

[0012] Furthermore, the main body as described above is separated by a separation groove at the accommodating cavity to form two arc-shaped clamping plates. Due to the existence of the separation groove, the two arc-shaped clamping plates are in a separated state, and due to the connection of the locking screw, the two arc-shaped clamping plates can approach each other to clamp the workpiece to be processed or reset and move away from each other to loosen the clamped workpiece to be processed.

[0013] Furthermore, the separation groove as described above includes a vertical groove body and a horizontal groove body, both of which are non-through groove bodies, so that the separation groove can be processed using wire cutting. The non-through design of the groove body means that the entire main body will not be substantially separated to form two separate parts, which facilitates the positioning and installation and fixing operations of the elastic clamp on the base plate.

[0014] Furthermore, a screw hole is processed on the main body as described above, the axial direction of the screw hole is perpendicular to the vertical groove body and is threadedly connected to the locking screw, and the screw hole is drilled in the radial direction of the main body.

[0015] Furthermore, the screw holes mentioned above are blind holes and are located on the left half and the right half respectively. Since the drilling of the screw holes does not penetrate the main body, the overall structural strength of the main body will not be reduced.

[0016] Furthermore, a limiting shaft is also provided at the bottom of the main body as described above, and a limiting hole is processed on the bottom plate. The limiting hole and the limiting shaft are matched with each other to facilitate the installation operation of the elastic clamp on the bottom plate, that is, it is used to limit the installation of the main body on the bottom plate, which is convenient for the subsequent bolt tightening connection operation between the two.

[0017] Furthermore, the connecting plate as described above is fixedly connected to a four-axis turntable, which is a type of machine tool workbench, so that the entire elastic clamping fixture can be used on the workbench of the machine tool.

[0018] Compared with the existing technology, the beneficial effects of the present invention are: the present device clamps the cylindrical workpiece to be processed through a two-half elastic chuck, and the inner circle of the accommodating cavity is an arc shape, which can avoid the outer circle of the workpiece to be processed from being clamped. At the same time, the entire elastic chuck is easy to disassemble and replace, which can shorten the processing time and adapt to workpieces of different sizes and specifications.

[0019] Because the two arc-shaped clamping plates of the elastic collet are designed in an arc shape and fit the cylindrical parts, they will not damage the surface of the cylindrical parts; there is a positioning hole between the elastic collet and the base plate. The next time you make the same cylindrical part, just install the corresponding elastic collet into the center hole of the base plate and lock it for use. In addition, you only need to replace different elastic collets to process multiple batches of cylindrical parts of different specifications, which can realize fast tooling replacement operations and shorten the clamping time of the entire tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a three-dimensional diagram of the utility model;

[0021] Figure 2 This is the main view of the utility model;

[0022] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0023] Figure 4 This is a schematic diagram of a clamping embodiment of the present utility model;

[0024] Figure 5 for Figure 4 Explosion diagram.

[0025] In the figure: 1. Connecting plate; 2. Bottom plate; 3. Locking screw; 4. Elastic chuck; 40. Main body; 41. Accommodating cavity; 42. Left half; 43. Right half; 44. Separation groove; 5. Workpiece to be processed; 6. Four-axis turntable. DETAILED DESCRIPTION

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "fixed", "installed", "connected", "set", etc. should be understood in a broad sense. For example, when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "installed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the two elements.

[0028] For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] Reference Figure 1-3 As shown, the utility model is an elastic clamping fixture for clamping cylindrical parts, including a connecting plate 1, a base plate 2 is fixed on the connecting plate 1, and the two are generally connected and fastened by a plurality of bolts, an elastic collet 4 is installed on the base plate 2, and the position of the elastic collet 4 is generally limited and the two are connected and fastened by a plurality of bolts, the elastic collet 4 includes a receiving cavity 41 for accommodating a workpiece 5 to be processed, the overall shape of the receiving cavity 41 is a circular hole structure, and the workpiece 5 to be processed is a cylindrical part, so that the workpiece 5 to be processed can be placed in the receiving cavity 41, and the elastic collet 4 is connected. The left half 42 and the right half 43 are separated by the dividing groove 44. The left half 42 and the right half 43 are connected by the locking screw 3, and the accommodating cavity 41 clamps the workpiece 5 to be processed. Generally, the locking screw 3 is rotated by a tool to make the left half 42 and the right half 43 approach each other, and the accommodating cavity 41 can shrink inward to achieve the purpose of clamping the workpiece 5 to be processed. Since the contour of the accommodating cavity 41 is close to the outer circumferential shape of the workpiece 5 to be processed, the contact surface area between the two can be maximized, that is, the force-bearing area of ​​the workpiece 5 to be processed is large, and it will not be easily clamped to affect its surface quality.

[0032] Example 2

[0033] Reference Figure 1-3 As shown, based on the technical solution of embodiment 1, an elastic clamping fixture for clamping cylindrical parts, such as Figure 3 As shown, the elastic chuck 4 includes a main body 40. The top of the main body 40 can be milled to form a receiving cavity 41. The bottom of the main body 40 is provided with a step position. The overall shape of the main body 40 can be obtained by machining to facilitate subsequent processing and positioning. The main body 40 is fixed to the base plate 2 by screwing screws at the step position.

[0034] Regarding the specific structural design of the accommodating cavity 41 and the separating groove 44, Figure 1 and Figure 3It can be seen that the accommodating cavity 41 is a blind hole machined on the main body 40. Due to the large diameter of the blind hole, it is generally obtained by milling. In addition, the main body 40 is separated by a dividing groove 44 at the accommodating cavity 41 to form two arc-shaped clamping plates. Due to the existence of the dividing groove 44, the two arc-shaped clamping plates are in a separated state, and due to the connection of the locking screw 3, the two arc-shaped clamping plates can be close to each other to clamp the workpiece 5 to be processed or reset and move away from each other to loosen the clamped workpiece 5 to be processed. In theory, there is no order requirement for the milling of the accommodating cavity 41 and the wire cutting of the dividing groove 44. In the actual processing, in order to avoid the left half 42 and the right half 43 that are first processed being subjected to vibration during the milling process and possibly offset, the accommodating cavity 41 is generally milled first, and then the dividing groove 44 is processed.

[0035] Further, such as Figure 3 As shown, the separating groove 44 is a groove formed by machining downward from the centerline of the top of the main body 40. The dimensional parameters of the separating groove 44 are selected based on the actual processing. Specifically, the separating groove 44 includes a vertical groove and a horizontal groove. Both the vertical groove and the horizontal groove are non-through grooves. In this way, the separating groove 44 can be machined using wire cutting. The non-through groove design prevents the entire main body 40 from being substantially divided into two separate parts, facilitating the positioning and installation of the elastic chuck 4 on the base plate 2.

[0036] As for the specific structural design of the locking screw 3, Figure 3 As shown, the main body 40 is machined with screw holes, the axial direction of which is perpendicular to the vertical groove and is threadedly connected to the locking screw 3. Specifically, the screw holes are blind holes and are located on the left half 42 and the right half 43 respectively. The screw holes are drilled in the radial direction of the main body 40, and the drilling of the screw holes does not penetrate the main body 40, so that the overall structural strength of the main body 40 is not reduced. In theory, there is no order requirement for the drilling and tapping of the screw holes and the wire cutting of the separation groove 44. In actual processing, in order to avoid the left half 42 and the right half 43 that are machined first being subjected to vibration and possible deviation during the drilling and tapping process, the screw holes are generally machined first, followed by the separation groove 44, and finally the threads of the screw holes are checked to match the locking screw 3.

[0037] Example 3

[0038] Reference Figure 1-5 As shown, based on the technical solution of the above embodiment, an elastic clamping fixture for clamping cylindrical parts is provided. The elastic clamping fixture is generally used on the workbench of a machine tool. Specifically, the connecting plate 1 is fixedly connected to the four-axis turntable 6. The four-axis turntable 6 is a kind of workbench. As a universal component, it can be quickly installed on the machine tool for use and will not be elaborated here.

[0039] Further, such as Figure 3 As shown, in order to facilitate the installation operation of the elastic clamp 4 on the base plate 2, a limiting shaft is also provided at the bottom of the main body 40, and a limiting hole is processed on the base plate 2. The limiting hole and the limiting shaft are matched with each other to enable the main body 40 to be installed and limited on the base plate 2, so as to facilitate the subsequent bolt tightening connection operation between the two.

[0040] The improvement of the device of the present utility model is that: because the two arc-shaped clamping plates of the elastic collet 4 are designed in an arc shape and fit the cylindrical part, the surface of the cylindrical part will not be damaged; a positioning hole with a diameter of 15 mm is provided between the elastic collet 4 and the base plate 2. Next time when making the same cylindrical part, the corresponding elastic collet 4 only needs to be installed into the center hole of the base plate 2 and locked for use. In addition, it is only necessary to replace different elastic collets 4 to process multiple batches of cylindrical parts of different specifications, which can realize the rapid replacement of tooling operations and shorten the clamping time of the entire tooling.

[0041] In the device of the present invention, the assembly and matching relationship of the various components involved, the locking screw 3, the four-axis turntable 6 and the threaded connection are existing technologies or materials. The relevant technical personnel can directly purchase or customize them from the market according to the required product models and specifications.

[0042] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity or industrial electricity, and the main controller can be a conventional known device such as a computer that plays a control role.

[0043] The above description is only a preferred specific embodiment of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above embodiment, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. Any person skilled in the art who is familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the scope of protection of the present invention.

Claims

1. An elastic clamping fixture for clamping cylindrical parts, comprising a connecting plate (1), characterized in that: A base plate (2) is fixed on the connecting plate (1), and an elastic chuck (4) is installed on the base plate (2). The elastic chuck (4) includes a receiving cavity (41) for accommodating a workpiece (5) to be processed. The elastic chuck (4) is separated by a separation groove (44) to form a left half (42) and a right half (43). The left half (42) and the right half (43) are connected by a locking screw (3) so that the receiving cavity (41) clamps the workpiece (5) to be processed.

2. The elastic clamping fixture for clamping cylindrical parts according to claim 1, characterized in that: The elastic clamp (4) comprises a main body (40), a receiving cavity (41) is processed on the top of the main body (40), and a step position is provided on the bottom of the main body (40).

3. The elastic clamping fixture for clamping cylindrical parts according to claim 2, characterized in that: The main body (40) is fixed on the bottom plate (2) by screwing at the step position.

4. The elastic clamping fixture for clamping cylindrical parts according to claim 2, characterized in that: The accommodating cavity (41) is a blind hole processed on the main body (40), and the separating groove (44) is a groove body processed downward along the center line on the top of the main body (40).

5. The elastic clamping fixture for clamping cylindrical parts according to claim 4, characterized in that: The main body (40) is separated by a separation groove (44) at the accommodating cavity (41) to form two arc-shaped clamping plates.

6. The elastic clamping fixture for clamping cylindrical parts according to claim 4, characterized in that: The separation groove (44) comprises a vertical groove body and a horizontal groove body, and both the vertical groove body and the horizontal groove body are non-through groove bodies.

7. The elastic clamping fixture for clamping cylindrical parts according to claim 6, characterized in that: A screw hole is machined on the main body (40), the axial direction of the screw hole is perpendicular to the vertical groove body and is threadedly connected to the locking screw (3).

8. The elastic clamping fixture for clamping cylindrical parts according to claim 7, characterized in that: The screw holes are blind holes and are located on the left half (42) and the right half (43) respectively.

9. The elastic clamping fixture for clamping cylindrical parts according to claim 2, characterized in that: The bottom of the main body (40) is also provided with a limiting shaft, and a limiting hole is processed on the bottom plate (2), and the limiting hole and the limiting shaft are connected in a hole-shaft matching manner.

10. An elastic clamping fixture for clamping cylindrical parts according to any one of claims 1 to 9, characterized in that: The connecting plate (1) is fixedly connected to the four-axis turntable (6).

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