Clamp assembly and lathe with same

Abstract

The utility model provides a clamp assembly and a lathe with the clamp assembly, and relates to the technical field of machining clamps, the clamp assembly comprises a base, the base comprises a reference column, a placement platform, a guide column and a fastener, a workpiece is clamped through cooperation of the guide column and the fastener, casting and blanking do not need to be conducted according to the shape of the workpiece, and the machining efficiency is improved. And the arc ring opening of the workpiece can be matched with the guide column, so that the blanking procedure is reduced. Meanwhile, a plurality of workpieces can be divided into a plurality of machining areas around the circumferential side of the guide column, after machining of one cylinder is completed, machining of another workpiece can be conducted by rotating the workpiece, the production technology is simplified, the production procedures are reduced, the machining efficiency is improved, and meanwhile the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of machining fixtures, and in particular to a fixture assembly and a lathe having the same. Background Art

[0002] With the gradual development of processing technology, the parts and components in various products are gradually becoming more complex and sophisticated. Under the premise of ensuring processing accuracy, in order to reduce the assembly errors between parts and components, parts and components with different structures are arranged into an integrated structure to increase their structural strength and accuracy.

[0003] Since the processing operation is mainly subtractive processing, the excess material on multiple structural surfaces is removed by cutting. For example, in the patent CN201810590482.9, the fork rod includes a combined cylinder and arc segment. Its processing method is usually to cut the material by casting to obtain a structure with a similar shape, then use a lathe to turn the cylinder, and then transfer to a milling machine to mill the arc segment, involving two different machine tools and multiple steps, multiple transfers and repeated positioning of the workpiece, low processing efficiency, and high cost.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] A technical problem to be solved by the present application is that the existing processing technology for combined cylinders and arc segments is complicated, inefficient and has high production costs.

[0006] To solve the above technical problems, on the first aspect, an embodiment of the present application provides a fixture assembly, which is used for clamping a workpiece, the workpiece includes an inner hole, the fixture assembly includes a base, the base includes a reference column, a placement platform, a guide column and a fastener, the reference column is detachably connected to the chuck of a lathe; the placement platform is fixedly connected to the reference column, and the placement platform is parallel to the axis of the reference column, the guide column is connected to the placement platform and extends along a side close to the axis of the reference column, and the fastener is slidably connected to the guide column; when in use, the workpiece is sleeved on the outer side of the guide column, and the fastener and the placement platform clamp the workpiece.

[0007] In some embodiments, the placement platform is provided with a positioning hole, the guide column includes a connected column section and a limiting section, the column section passes through the positioning hole, and the limiting section abuts against a side of the placement platform away from the axis of the reference column.

[0008] In some embodiments, the column segment is loosely matched with the positioning hole.

[0009] In some embodiments, the gap between the column segment and the positioning hole is between . and .mm.

[0010] In some embodiments, the guide column is provided with a threaded section, the threaded section is fixed to an end of the guide column away from the limiting section, the fastener is a nut, and the fastener is threadably matched with the threaded section.

[0011] In some embodiments, a buffer structure is disposed between the fastener and the workpiece.

[0012] In some embodiments, when the fixture assembly is in use, the distances between the axis of the reference column and the upper surface and the lower surface of the workpiece are equal.

[0013] In some embodiments, the distance between the axis of the reference column and the side of the placement platform facing the workpiece is equal to half the thickness of the workpiece along the axis of the guide column.

[0014] In some embodiments, the fixture assembly includes an adjustment plate, which is disposed between the workpiece and the placement platform, and the adjustment plate is made of a rigid material.

[0015] In the second aspect, the present application provides a lathe, which includes an output assembly, a chuck and a clamp assembly. The clamp assembly is the above-mentioned clamp assembly, and the reference column of the base on the clamp assembly is detachably connected to the chuck, and the output assembly drives the clamp assembly to rotate through the chuck.

[0016] Through the above technical scheme, the present application provides a fixture assembly and a lathe having the same, wherein the fixture assembly is used for clamping a workpiece, the workpiece includes an inner hole, the fixture assembly includes a base, the base includes a reference column, a placement platform, a guide column and a fastener, the reference column is detachably connected to the chuck of the lathe; the placement platform is fixedly connected to the reference column, and the placement platform is parallel to the axis of the reference column, the guide column is connected to the placement platform and extends along a side close to the axis of the reference column, and the fastener is slidably connected to the guide column; when in use, the workpiece is sleeved on the outer side of the guide column, and the fastener and the placement platform clamp the workpiece.

[0017] Through the cooperation of the guide column and the fastener, the workpiece is clamped, and there is no need to cast and cut according to the original workpiece. It can meet the requirements of the arc circle of the workpiece and the guide column, reducing the cutting process. Combined with the connection between the reference column and the chuck of the lathe, the rotation along the axis of the reference column is realized to cooperate with the tool of the lathe for cutting and realize the processing of the cylinder. After the processing is completed, the process requirements of the cylinder and the arc segment can be met.

[0018] In addition, the above-mentioned arrangement can divide the material into multiple processing areas by surrounding the circumference of the guide column during cutting. After completing the processing of one cylinder, the workpiece can be rotated to process another workpiece. This not only simplifies the production process, reduces the production process, and improves the processing efficiency, but also reduces the production cost.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A partial cross-sectional schematic diagram of a clamp assembly disclosed in an embodiment of the present application when in use is shown;

[0022] Figure 2 Shows Figure 1 A partial cross-sectional schematic diagram of the reference column and the placement platform of the fixture assembly;

[0023] Figure 3 Shows Figure 1 A schematic diagram of the structure of the fixture assembly reference column and the lathe chuck;

[0024] Figure 4 Shows Figure 1 Schematic diagram of the matching structure of the guide column and the fastener in the clamp assembly;

[0025] Figure 5 A schematic diagram of a front view of a workpiece after machining in an embodiment of the present application is shown;

[0026] Figure 6 Shows Figure 5 Schematic diagram of the workpiece from top view;

[0027] Figure 7 Shows Figure 5 Schematic diagram of the workpiece structure after machining is completed but not decomposed.

[0028] The above drawings contain the following reference numerals:

[0029] 10. Base; 11. Reference column; 12. Placing platform; 121. Positioning hole; 13. Guide column; 131. Column section; 132. Limiting section; 133. Threaded section; 14. Fastener; 20. Workpiece; 21. Inner hole; 22. Cylinder; 23. Arc section; 30. Buffer structure; 40. Adjustment sheet; 50. Chuck; 60. Drive shaft. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0031] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0032] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0034] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0035] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0037] like Figure 1 As shown, in the first aspect, in some embodiments of the present application, a fixture assembly is provided, which is used for clamping a workpiece 20, and the workpiece 20 includes an inner hole 21, and the fixture assembly includes: a base 10, the base 10 includes a reference column 11, a placement platform 12, a guide column 13 and a fastener 14, the reference column 11 is detachably connected to the chuck 50 of the lathe; the placement platform 12 is fixedly connected to the reference column 11, and the placement platform 12 is parallel to the axis of the reference column 11, the guide column 13 is connected to the placement platform 12, and extends along a side close to the axis of the reference column 11, and the fastener 14 is slidably connected to the guide column 13; when in use, the workpiece 20 is sleeved on the outer side of the guide column 13, and the fastener 14 and the placement platform 12 clamp the workpiece 20.

[0038] Through the cooperation of the guide column 13 and the fastener 14, the workpiece 20 is clamped, and there is no need to cast and blank according to the original shape of the workpiece 20. It is sufficient to meet the requirements that the arc segment 23 of the workpiece 20 matches the guide column 13, thereby reducing the blanking process. The reference column 11 is connected to the chuck 50 of the lathe, and the rotation along the axis direction of the reference column 11 is realized to cooperate with the tool of the lathe for cutting, so as to realize the processing of the cylinder 22. After the processing is completed, the process requirements of the cylinder 22 and the arc segment 23 can be met.

[0039] It should be noted that after the internal arc of the inner hole 21 is processed, it is decomposed accordingly to obtain the arc segment 23. The processing of the cylinder 22 based on the inner hole 21 can meet the accuracy requirements between the two. The parts have high precision, that is, round bars or square bars can be selected when cutting, and the inner hole 21 is processed at the center position. The processing process does not require high-precision positioning, and the distance between the hole wall of the inner hole 21 and the material boundary is equal to the distance from the inner wall of the arc segment 23 to the end of the cylinder 22. This setting reduces the need for cutting, multiple transfers, and repeated positioning, and the process flow is effectively optimized and improved, which improves production efficiency and reduces the processing cost of a single workpiece 20.

[0040] In some embodiments of the present application, the plurality of workpieces 20 processed are as follows Figure 7As shown, the inner wall of the inner hole 21 is a plurality of arc segments 23 of the workpiece 20, and the inner hole 21 is circular. Therefore, along the circumferential direction of the inner hole 21, a plurality of cylinders 22 can be processed while satisfying the span of the arc segment 23. When dividing, the cutting can be performed based on the position of the cylinder 22, which can meet the structural requirements of the parts. Such a setting has a higher degree of freedom in processing and will not affect the structural accuracy of the finished workpiece.

[0041] like Figures 1 to 3 As shown, in some embodiments of the present application, the placement platform 12 is provided with a positioning hole 121, and the guide column 13 includes a connected column segment 131 and a limiting segment 132, the column segment 131 passes through the positioning hole 121, and the limiting segment 132 is against a side of the placement platform 12 away from the axis of the reference column 11.

[0042] Such an arrangement realizes a detachable connection of the guide column 13 , so that guide columns 13 of different sizes can be replaced during use to adapt to the requirements of arc segments 23 of different curvatures on different workpieces 20 .

[0043] It should be noted that the positioning hole 121 is provided for positioning, and its axis intersects with the axis of the reference column 11 , so that the matching relationship between the guide column 13 and the workpiece 20 and the axis of the reference column 11 can be satisfied during the assembly process.

[0044] Furthermore, in some optional embodiments, arc scales are provided on the outer side of the locating hole 121, and such a setting is more conducive to positioning.

[0045] In some optional embodiments, the size of the column segment 131 is adapted to the workpiece 20, and a positioning segment can be separately provided between the column segment 131 and the limiting segment 132, and the positioning segment is adapted to the positioning hole 121, that is, the size of the column segment 131 can be changed according to actual needs to adapt to multiple workpieces, and the positioning segment can meet the matching accuracy requirements of the positioning hole 121, so that the guide column 13 only needs to be replaced without replacing other components.

[0046] The guide column 13 is made of a material with high rigidity and high strength, so that it can better cope with the torque generated during turning and play a role in precise processing.

[0047] like Figure 1 As shown, in some embodiments of the present application, the column segment 131 and the positioning hole 121 are clearance-fitted; the setting of the clearance-fitting can satisfy the sliding fit between the column segment 131 and the positioning hole 121, and achieve the effect of assembly adjustment. In addition, the clearance-fitting between the column segment 131 and the positioning hole 121 can enable the user to position the workpiece when clamping it.

[0048] Specifically, the axis of the positioning hole 121 intersects with the axis of the reference column 11, and the column segment 131 is fitted with the hole wall of the positioning hole 121 along the axis direction of the reference column 11, so that the axis of the column segment 131 intersects with the axis of the reference column 11. After the column segment 131 is fixed, the column segment 131 is fitted with the inner hole 21 along the axis direction of the reference column 11, so that the axis of the inner hole 21 intersects with the axis of the reference column 11, thereby completing the positioning relationship between the workpiece 20 and the reference column 11, so that the workpiece 20 is symmetrical about the axis center of the reference column 11, so that it can be rotated to form a cylinder 22. Such a setting is convenient for assembly, and only needs to be positioned along the axis direction of the unified reference column 11. The positioning operation is simple and convenient, and the contact between the circular surfaces is a line contact, which can better observe whether there is an error in positioning, and at the same time will not affect the position accuracy along the axis direction of the reference column 11.

[0049] In some embodiments of the present application (not shown in the figure), the gap between the column segment 131 and the positioning hole 121 is between 0.05 and 0.1 mm. Such a setting can meet the requirements of sliding adjustment. At the same time, the gap between the two is small, the adjustment range is small, and the debris generated during turning will not enter the gap between the column segment 131 and the positioning hole 121, which plays a protective role on the positioning guide column 13 and the positioning hole 121, which is conducive to extending the service life.

[0050] like Figure 4 As shown, in some embodiments of the present application, the guide column 13 is provided with a threaded section 133, the threaded section 133 is fixed to one end of the guide column 13 away from the limiting section 132, the fastener 14 is a nut, and the fastener 14 is threadedly matched with the threaded section 133. The threaded fastener 14 and the threaded section 133 can form a self-locking thread, effectively avoiding looseness during the processing process, and can better adapt to the turning processing environment.

[0051] It should be noted that the diameter of the threaded section 133 is smaller than the diameter of the column section 131. This arrangement ensures that after the fastener 14 is installed, the area of ​​its cross-section is close to the area of ​​the column section 131. This will not produce a large clamping area for the workpiece 20 based on positioning, thereby avoiding interference in the process of machining the cylinder 22, which would cause the turning tool to hit the fastener 14.

[0052] like Figure 1 and Figure 4As shown, in some embodiments of the present application, a buffer structure 30 is provided between the fastener 14 and the workpiece 20. The buffer structure 30 is provided to provide bearing pressure when the fastener 14 is fastening, so that the buffer structure 30 presses the workpiece 20 to ensure the accuracy requirement along the axis direction of the inner hole 21 during the turning process, and can also push the fastener 14 and the workpiece 20 respectively through the deformation of the buffer structure 30 itself to ensure that their relative positions do not change.

[0053] The buffer structure 30 can be a flat pad, an elastomer, rubber, silicone and other materials, and can be a generally annular structure, the inner ring of which is adapted to the column section 131. A rubber material can be selected, such as natural rubber, which has good elasticity and strength, strong self-reinforcement, and excellent flex fatigue resistance. Generally, cracks will appear after 200,000 flexions, meeting the strength requirements.

[0054] like Figure 1 As shown, in some embodiments of the present application, when the fixture assembly is in use, the distances between the axis of the reference column 11 and the upper surface and the lower surface of the workpiece 20 are equal. Such an arrangement makes the workpiece 20 symmetrical about the axis position of the reference column 11 when the fixture assembly is in use. Such an arrangement cooperates with the guide column 13 to achieve the coincidence of the axis of the reference column 11 with the axis of the cylinder 22 to be processed, thereby meeting the cutting requirements.

[0055] In some embodiments of the present application (not shown in the figure), the distance between the axis of the reference column 11 and the side of the placement platform 12 facing the workpiece 20 is equal to half the thickness of the workpiece 20 along the axis of the guide column 13. Such a setting can directly adapt to the workpiece 20 of this thickness, reducing the positioning requirements in the vertical direction.

[0056] like Figure 4 As shown, in some embodiments of the present application, the fixture assembly includes an adjustment sheet 40, which is arranged between the workpiece 20 and the placement platform 12, and the adjustment sheet 40 is made of a rigid material. The adjustment sheet 40 is arranged to adjust the distance between the side of the workpiece 20 facing the placement platform 12 and the placement platform 12, and the rigid material will not be deformed, thereby ensuring accuracy in the thickness direction. Such a setting can be adjusted to adapt to workpieces 20 materials of different thicknesses to turn cylinders 22 of different sizes.

[0057] It should be noted that the thickness of the adjustment sheet 40 is a unit thickness, which can be 1 mm or 0.5 mm, so that it is easier to adjust in the thickness direction. Its surface can be coated with a non-stick coating to prevent dust from entering, thereby meeting the needs of precision adjustment.

[0058] In the second aspect, an embodiment of the present application provides a lathe, which includes an output assembly, a chuck 50 and a fixture assembly. The fixture assembly is the fixture assembly in the above-mentioned embodiments. The reference column 11 of the base 10 on the fixture assembly is detachably connected to the chuck 50, and the output assembly drives the fixture assembly to rotate through the chuck 50.

[0059] The chuck 50 specifically outputs power through the drive shaft 60, so that the clamp assembly rotates, and at the same time cooperates with the turning tool to complete the cutting process of the cylindrical body 22 of the workpiece 20. After completing a single processing operation, the workpiece 20 can be rotated by a certain angle to perform the cutting process of the second cylindrical body 22, which effectively improves the efficiency of processing the cylindrical bodies 22 of multiple workpieces 20.

[0060] The lathe of the above embodiment is used to perform the following Figure 5 and Figure 6 The workpiece processing needs to follow the following operation process:

[0061] Cutting, drilling a round bar or square bar according to the arc segment 23 of the workpiece 20, the drilling diameter is equal to the diameter of the arc segment 23, and the material bar meets the requirement of being larger than the sum of the diameter of the inner hole 21, twice the thickness of the arc segment 23 and twice the length of the cylinder 22.

[0062] After drilling, the material rod satisfies that the distance between the hole wall of the inner hole 21 and the outer wall of the material is greater than the sum of the thickness of the arc segment 23 and the length of the cylinder 22 .

[0063] Slices are cut, and the slice thickness is equal to the diameter of the cylinder 22.

[0064] The workpiece 20 is installed so that the axis of the inner hole 21 and the axis of the guide column 13 intersect with the axis of the reference column 11 .

[0065] Tightening the fastener 14 completes the positioning of the workpiece.

[0066] The driving shaft 60 is started to rotate, and the turning tool is fed at the same time to cut the cylindrical body 22.

[0067] After the cutting of one cylinder 22 is completed, the fastener 14 is loosened, and the workpiece 20 is rotated with an amplitude greater than the span of a single arc segment 23 to cut the second cylinder 22 .

[0068] When the workpiece 20 is not sufficient for cutting the next cylinder 22, the workpiece 20 is removed to obtain Figure 7 The assembly of multiple workpieces 20 shown is not separated, and the assembly is cut and trimmed to be divided into four standard workpieces 20.

[0069] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0070] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A clamp assembly, used for clamping a workpiece (20), wherein the workpiece (20) comprises an inner hole (21), characterized in that: include: A base (10), the base (10) comprising a reference column (11), a placement platform (12), a guide column (13) and a fastener (14), the reference column (11) being detachably connected to a chuck (50) of a lathe; The placement platform (12) is fixedly connected to the reference column (11), and the axes of the placement platform (12) and the reference column (11) are parallel. The guide column (13) is connected to the placement platform (12) and extends along a side close to the axis of the reference column (11). The fastener (14) is slidably connected to the guide column (13). When in use, the workpiece (20) is sleeved on the outer side of the guide column (13), and the fastener (14) and the placement platform (12) clamp the workpiece (20).

2. The clamp assembly according to claim 1, characterized in that: The placement platform (12) is provided with a positioning hole (121); the guide column (13) comprises a connected column section (131) and a limiting section (132); the column section (131) passes through the positioning hole (121); and the limiting section (132) abuts against a side of the placement platform (12) away from the axis of the reference column (11).

3. The clamp assembly according to claim 2, characterized in that: The column section (131) is clearance-matched with the positioning hole (121).

4. The clamp assembly according to claim 3, characterized in that: The gap between the column segment (131) and the positioning hole (121) is between 0.05 and 0.1 mm.

5. The clamp assembly according to claim 2, characterized in that: The guide column (13) is provided with a threaded section (133), the threaded section (133) is fixed to an end of the guide column (13) away from the limiting section (132), the fastener (14) is a nut, and the fastener (14) is threadably matched with the threaded section (133).

6. The clamp assembly according to claim 5, characterized in that: A buffer structure (30) is provided between the fastener (14) and the workpiece (20).

7. The clamp assembly according to any one of claims 1 to 6, characterized in that: When the clamp assembly is in use, the distances between the axis of the reference column (11) and the upper surface and the lower surface of the workpiece (20) are equal.

8. The clamp assembly according to claim 7, characterized in that: The distance between the axis of the reference column (11) and the side of the placement platform (12) facing the workpiece (20) is equal to half the thickness of the workpiece (20) along the axis of the guide column (13).

9. The clamp assembly according to claim 7, characterized in that: The clamp assembly comprises an adjustment plate (40), wherein the adjustment plate (40) is arranged between the workpiece (20) and the placement platform (12), and the adjustment plate (40) is made of a rigid material.

10. A lathe, characterized in that: The lathe comprises an output assembly, the chuck (50) and a fixture assembly, wherein the fixture assembly is the fixture assembly described in any one of claims 1 to 9, wherein a reference column (11) of a base (10) on the fixture assembly is detachably connected to the chuck (50), and the output assembly drives the fixture assembly to rotate via the chuck (50).

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