High-precision drilling guiding and pressing device

Abstract

A high-precision drilling guiding and pressing device comprises a drill sleeve, an inner sleeve, an outer sleeve, a spring and an inner protective sleeve, the outer sleeve is of a cylindrical structure, the inner sleeve comprises a first cylindrical head and a second cylindrical tail which are formed into a whole, the gap between the outer surface of the inner sleeve and the inner surface of the outer sleeve ranges from 0.03 mm to 0.05 mm, and the inner sleeve and the outer sleeve slide relative to each other; a spring is arranged between the inner sleeve and the outer sleeve; the end wall of the first cylindrical head part and the end wall of the second cylindrical tail part of the inner sleeve respectively contain a drill bushing, a hollow rectangular groove is formed in the part between the two drill bushings, and the two ends of the rectangular groove are chamfered to discharge scrap iron and break the scrap iron; the right end of the outer sleeve is fixed to the end of a drilling machine main shaft or a power head main shaft, after the drill sleeve makes contact with a machined part, the inner sleeve compresses the spring and moves backwards, and the cutter extends out of the drill sleeve for machining. The drilling and tapping operations can be carried out without pressing, so that the working efficiency is improved, and the drilling precision and the guiding precision are high.

Description

Technical Field

[0001] The utility model relates to a machine tool, in particular to a drilling guide clamping device. Background Art

[0002] When drilling or tapping with an existing drilling machine or drilling power head, the workpiece is generally placed on a workbench, the workpiece is positioned and pressed, and then drilling and tapping are performed. For large-scale workpiece processing, the proportion of work time occupied by workpiece positioning and pressing is not large. However, for large-volume small-scale processing, the workload of positioning and pressing is relatively large, and drilling and tapping machine processing occupies less work time. In order to improve the machining efficiency of this type of workpiece, a process equipment that can perform drilling and tapping machine processing without pressing is urgently needed.

[0003] A similar solution is to make a drilling and tapping machine processing tooling, which is equipped with a guide device such as a drill sleeve and installed on a workbench. Each time a workpiece is processed, the workpiece is positioned and locked before the machining operation begins.

[0004] For a particularly large number of workpieces, punching is also used to complete this operation, which has higher work efficiency, but the tooling and mold costs are high and the cycle is long, so it is only suitable for machining of very large batches of workpieces.

[0005] In addition, for workpieces that are suspended in the air after positioning, the commonly used clamping drilling method causes the workpiece to swing back and forth when the drill is fed, making it impossible to process and easily causing the drill to break. Utility Model Content

[0006] The utility model aims to provide a high-precision drilling guide clamping device, so that drilling and tapping operations can be performed without clamping, so as to improve work efficiency, and the drilling accuracy and guiding accuracy are high.

[0007] To achieve the above-mentioned purpose, the utility model provides a high-precision drilling guide clamping device, including a drill sleeve, an inner sleeve, an outer sleeve, a spring, and an inner sleeve, wherein the outer sleeve is a circular cylindrical structure, the inner sleeve includes a first cylindrical head and a second cylindrical tail formed as a whole, the outer diameter of the first cylindrical head is smaller than the outer diameter of the second cylindrical tail, the outer surface of the inner sleeve and the inner surface of the outer sleeve are matched with a small gap, the gap is between 0.03 and 0.05 mm, so that the outer sleeve and the inner sleeve can slide relative to each other; the spring is installed between the inner sleeve and the outer sleeve, and the spring is pre-tightened when assembled to provide an initial clamping force on the workpiece, wherein the right side stop of the inner sleeve is used to install one end of the spring, and the inner sleeve is fixed to the inner wall of the outer sleeve to provide a support seat for the other end of the spring; the first circular The cylindrical head and the second cylindrical tail both form end walls at the left end, the first cylindrical head and the second cylindrical tail both form end walls at the left end, the end walls of the first cylindrical head and the second cylindrical tail both have holes along the axis of the inner sleeve to accommodate one of the drill sleeves respectively; and the first cylindrical head has an empty rectangular groove in the portion corresponding to the portion between the two drill sleeves, and both ends of the rectangular groove are chamfered to discharge and break iron chips; the clamping device is fixed to the drill press spindle or the power head spindle end by fixing the right end of the outer sleeve to the drill press spindle or the power head spindle end with a fastener; when the drill sleeve contacts the workpiece, the inner sleeve moves backward to compress the spring, so that the tool on the drill press spindle or the power head spindle end extends from the drill sleeve for processing.

[0008] As a preferred embodiment, the drill sleeve has a positioning groove that cooperates with the locking screw, and the width of the positioning groove is suitable for the locking screw to prevent the drill sleeve from moving forward and backward or circumferentially; and the positioning groove is processed into an arc shape to prevent the drill sleeve from rotating when it is not tightly locked, and the radius of this arc should be smaller than the radius of the outer surface of the drill sleeve.

[0009] As a preferred embodiment, a guide column is installed above the outer sleeve, one side of the guide column is cylindrical and slides in the keyway of the inner sleeve, and the other side of the guide column is threaded and fastened to the outer sleeve and locked with a locking nut.

[0010] As a preferred embodiment, the gap between the drill sleeve and the shaft of the tool is between 0.015 and 0.03 mm.

[0011] As a preferred embodiment, 4-8 narrow slots are opened at the right end of the outer sleeve, and a groove is provided on the outside of the outer sleeve for placing a clamp. The width of each narrow slot is 2-3 mm, and the depth is 1 cm deeper than the groove. There is a crack stop hole at the terminal, and the right end of the outer sleeve is fixed to the main shaft of the drilling machine or the main shaft end of the power head through the clamp.

[0012] As a preferred embodiment, the left end of the outer sleeve blocks the left shoulder of the second cylindrical tail portion of the inner sleeve by installing a pressure plate.

[0013] As a preferred embodiment, the inner sheath is a stepped structure, the small diameter portion is used to install the spring, and the large diameter portion is installed in cooperation with the outer sheath.

[0014] As a preferred embodiment, the clamping device further comprises a hole retaining ring, which is installed through a mounting groove on the outer sleeve to limit the inner sleeve.

[0015] As a preferred embodiment, an oil cup is installed above the outer sleeve for injecting lubricating grease into the sliding surfaces of the inner sleeve and the outer sleeve.

[0016] As a preferred embodiment, the clamping device can be used for chamfering and tapping of drilling holes, bores and hole ends.

[0017] Compared with the prior art, the utility model installs the process device on the machine tool spindle, presses the workpiece as the machine tool spindle rises and falls, and is provided with an elastic element. As the workpiece is drilled deeper, the pressing force increases continuously, making the drilling process more reliable.

[0018] In addition, it can be equipped with a double guide drill sleeve to make the hole roundness and dimensional accuracy of the drilling operation higher. The drilled iron chips have a chip breaking device, which can effectively protect the drill bit and improve the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation of a high-precision drilling guide clamping device according to an embodiment of the utility model.

[0020] Figure 2 This is an assembly diagram of a high-precision drilling guide clamping device according to an embodiment of the utility model.

[0021] Figure 3 A cross-sectional view of the jacket.

[0022] Figure 4 A cross-sectional view of the inner sleeve.

[0023] Figure 5 A top view of the inner sleeve.

[0024] Figure 6 for Figure 2 A-direction view.

[0025] Figure 7 for Figure 2 BB cross-sectional view shows a cross-sectional view of the inner sleeve head of the embodiment.

[0026] Figure 8A cross-sectional view of the inner sheath.

[0027] Fig. 9 A cross-sectional view of the drill sleeve.

[0028] Fig.10 for Fig. 9 CC cross-sectional view.

[0029] Summary of reference numerals: drill sleeve 1; set screw 2; screw 3; pressure plate 4; inner sleeve 5; guide column 6; locking nut 7; oil cup 8; outer sleeve 9; spring 10; inner sleeve 11; retaining ring for hole 12; clamp 13; workpiece 14; drill bit 15; drill clamp 16; spindle 17; spindle sleeve 18 DETAILED DESCRIPTION

[0030] Hereinafter, an embodiment of the high-precision drilling guide clamping device of the present invention will be described with reference to the accompanying drawings.

[0031] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0032] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structure of various components of the embodiments of the utility model, the drawings are not necessarily drawn in the same proportion.

[0033] Figure 1 This is a schematic diagram of the installation of the high-precision drilling guide clamping device of the embodiment of the utility model. Figure 2 This is an assembly diagram of a high-precision drilling guide clamping device according to an embodiment of the utility model.

[0034] See also Figure 1 and 2 ,like Figure 1 As shown, the clamping device of this embodiment is fixed to the main shaft of the drilling machine or the main shaft end of the power head by fastening the right end of the outer sleeve 9 to the main shaft end of the drilling machine or the power head with a fastener. When the drill sleeve 1 contacts the workpiece 14 to be processed, the inner sleeve 5 moves backwards and compresses the spring 10, so that the tool on the main shaft end of the drilling machine or the power head, in this embodiment, the drill bit 15, extends from the drill sleeve 1 to process the workpiece 14. The main shaft end of the drilling machine or the power head includes a drill bit 15, a drill clamp 16, a spindle 17, and a spindle sleeve 18.

[0035] After research and experiments, the gap between the shaft of the drill bit 15 and the drill sleeve 1 is optimally between 0.015 and 0.03 mm, which can ensure the excellent performance of the clamping device. That is, in the present utility model, the gap between the shaft of the tool and the drill sleeve 1 is optimally between 0.015 and 0.03 mm.

[0036] See also Figure 2 The high-precision drilling guide clamping device of the embodiment of the utility model includes, from left to right, a drill sleeve 1; a pressure plate 4; an inner sleeve 5; a guide column 6; an outer sleeve 9; a spring 10; an inner sleeve 11; a hole retaining ring 12; and a clamp 13.

[0037] In addition, if Figure 2 As shown, the clamping device further comprises a set screw 2, a screw 3, and a locking nut 7 as fixing members, wherein the locking nut 7 is used to fix the guide column 6. The clamping device may also comprise an oil cup 8 for lubrication between the inner sleeve 5 and the outer sleeve 9.

[0038] See also Figure 2 and 3 The outer sleeve 9 is a circular cylindrical structure, and the left end is connected to the inner sleeve 5 through the pressing plate 4. The outer sleeve 9 and the inner sleeve 5 are matched with a small gap and can slide relative to each other.

[0039] The outer surface of the inner sleeve 5 and the inner surface of the outer sleeve 9 should be reasonably matched, and the accuracy of the match directly determines the success of the clamping device. If the matching clearance is too small, the relative sliding of the inner and outer sleeves will be blocked during the drilling process, and the drill bit cannot be extended or the device will fall off the main shaft of the drilling machine. If the matching clearance is too large, it may cause the inner sleeve to swing during the drilling process, which may easily cause poor guidance accuracy, excessive positioning accuracy of the drilled hole and hole size accuracy, and may also cause the drill bit to break. After difficult research and experiments, the inventor finally determined that the gap is best controlled between 0.03 and 0.05 mm. Even if the lubrication is temporarily poor, the drilling operation can be carried out normally.

[0040] like Figure 2 and Figure 7 As shown, the right end of the outer sleeve 9 is provided with 4-8 slots and a groove on the outside for placing the clamp 13. The width of each slot is 2-3 mm, the depth is about 1 cm deeper than the groove, and the terminal has a stop hole. Figure 2 The slot depth and the crack stop hole are shown in the figure at the axis position. The whole device is fixed to the main shaft of the drilling machine or the main shaft end of the power head by the clamp 13, and the fixation must be firm and reliable. The main shaft end of the drilling machine or the main shaft end of the power head is inserted into the right end of the outer sleeve 9 to match. Due to the slot, the right end of the outer sleeve 9 can be deformed under the tightening force of the clamp 13 to clamp the main shaft end of the drilling machine or the power head.

[0041] An oil cup 8 is arranged above the outer sleeve 9 for injecting lubricating grease into the sliding surfaces of the inner sleeve 5 and the outer sleeve 9.

[0042] A guide post 6 is mounted above the outer sleeve 9. One side of the guide post 6 is cylindrical and slides in the keyway of the inner sleeve 5. The other side is threaded and fastened to the outer sleeve 9 and locked with a locking nut 7. It is mainly used to control the relative sliding direction of the inner sleeve 5 and the outer sleeve 6.

[0043] A spring 10 is installed between the inner sleeve 5 and the outer sleeve 9. The spring 10 is pre-tightened during assembly to provide an initial pressing force on the workpiece. The stroke and maximum pressing force of the spring 10 are controlled by calculation, which can be realized by those skilled in the art.

[0044] See also Figure 8 The inner sheath 11 is a support seat for the right side of the spring, which is a stepped structure. The small diameter is used to install the spring 10, and the large diameter side is installed in conjunction with the outer sleeve 9. The position of the inner sheath 11 is limited by the hole retaining ring 12. The hole retaining ring 12 is installed through the installation groove on the outer sleeve 9.

[0045] See also Figure 2 , 4 And and 5, the right stop of the inner sleeve is used to install the spring 10, and the inner cavity is used to accommodate the drill sleeve at the end of the spindle and the root of the drill bit.

[0046] The left side of the inner sleeve is provided with two drill sleeves 1 through the finely processed holes, and the drill sleeves 1 are used in conjunction with the drilled holes. The drill sleeves 1 are provided with positioning grooves, and are locked with set screws 2 through the threaded holes processed on the outer sleeve 9, so that they do not loosen during use.

[0047] See also Fig. 9 and 10 The drill sleeve 1 has a positioning groove that matches the set screw. The width of the positioning groove should be appropriate and should be properly matched with the clamping screw. If it is too wide, the axial positioning will be inaccurate, and if it is too narrow, the clamping will not be in place, which will cause the drill sleeve to move forward and backward or circumferentially during the drilling process. In addition, the groove of the drill sleeve 1 is processed into an arc shape, which can more effectively tighten the drill sleeve and prevent the drill sleeve 1 from rotating when it is not tightened. If it is a plane, it cannot prevent the drill sleeve 1 from swinging in a small range when it rotates. The radius of this arc should be smaller than the radius of the outer surface of the drill sleeve.

[0048] like Figure 4 , 5 As shown in FIG. 6 , an empty rectangular groove is processed between the two drill sleeves 1 , and both ends of the rectangular groove are chamfered, which is used to discharge iron chips and also plays a role in breaking iron chips, so that the iron chips will not cause unnecessary damage to the drill bit of the drill sleeve 1 .

[0049] After the device of the present invention is fixed to the main spindle head of the drilling machine, during the drilling operation, the device moves to the surface of the workpiece together with the main spindle, and the workpiece is pressed before drilling, and the drill bit then performs the drilling operation. During this period, the iron chips drilled out pass through the outermost drill sleeve and the hollow groove of the inner sleeve, and the iron chips are broken into small segments at the same time. At the same time, after the drill bit is positioned by two drill sleeves, its drilling accuracy and positioning accuracy can be ensured to be high. And as the drill bit penetrates deeper into the workpiece, the pressing force will gradually increase, which is more conducive to the drilling operation.

[0050] The cooling during drilling operation can be selected according to the size, depth and material conditions of the hole to be drilled, and whether to add coolant.

[0051] The clamping device of the utility model can be used for drilling holes and bore holes, and can also be used for chamfering and tapping operations at the hole ends. The drill bit can be replaced with a corresponding tool.

[0052] The clamping device of the utility model has been verified by experiments to have a good use effect and can effectively improve the efficiency of the drilling process of a large number of small parts.

[0053] The above describes the implementation methods of the high-precision drilling guide clamping device of the present invention, and its purpose is to explain the spirit of the present invention. Please note that those skilled in the art can modify and combine the features of the above-mentioned implementation methods without departing from the spirit of the present invention. Therefore, the present invention is not limited to the above-mentioned implementation methods. The specific features of the high-precision drilling guide clamping device, such as shape, size and position, can be specifically designed according to the effects of the features disclosed above, and these designs can be implemented by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combination with other features that have been disclosed. Those skilled in the art can also make other combinations between the technical features according to the purpose of the utility model, so as to achieve the purpose of the utility model.

Claims

1. A high-precision drilling guide clamping device, characterized in that: It includes a drill sleeve, an inner sleeve, an outer sleeve, a spring, and an inner sleeve, wherein: The outer sleeve is a circular cylindrical structure, and the inner sleeve includes a first cylindrical head and a second cylindrical tail formed in one piece, the outer diameter of the first cylindrical head is smaller than the outer diameter of the second cylindrical tail, and the outer surface of the inner sleeve and the inner surface of the outer sleeve are matched with a small gap, and the gap is between 0.03 and 0.05 mm, so that the outer sleeve and the inner sleeve can slide relative to each other; The spring is installed between the inner sleeve and the outer sleeve, and the spring is pre-tightened during assembly to provide an initial pressing force on the workpiece, wherein the right stop of the inner sleeve is used to install one end of the spring, and the inner sleeve is fixed to the inner wall of the outer sleeve to provide a support seat for the other end of the spring; The first cylindrical head and the second cylindrical tail both form an end wall at the left end, the first cylindrical head and the second cylindrical tail both form an end wall at the left end, the end walls of the first cylindrical head and the second cylindrical tail both have holes along the axis of the inner sleeve to accommodate one of the drill sleeves respectively; and the first cylindrical head has an empty rectangular groove at the portion corresponding to the space between the two drill sleeves, and both ends of the rectangular groove are chamfered to discharge and break the iron chips; The clamping device is fixed to the drilling machine spindle or the power head spindle end by fixing the right end of the outer sleeve to the drilling machine spindle or the power head spindle end with a fastener; when the drill sleeve contacts the workpiece, the inner sleeve moves backward to compress the spring, so that the tool on the drilling machine spindle or the power head spindle end extends from the drill sleeve for processing.

2. The high-precision drilling guide clamping device according to claim 1, characterized in that: The drill sleeve has a positioning groove that matches the set screw, and the width of the positioning groove is suitable for the set screw to prevent the drill sleeve from moving forward and backward or circumferentially; and the positioning groove is processed into an arc shape to prevent the drill sleeve from rotating when it is not tightly set, and the radius of this arc should be smaller than the radius size of the outer surface of the drill sleeve.

3. The high-precision drilling guide clamping device according to claim 1, characterized in that: A guide column is arranged above the outer sleeve, one side of the guide column is cylindrical and slides in the keyway of the inner sleeve, and the other side of the guide column is threaded and fastened to the outer sleeve and locked with a locking nut.

4. The high-precision drilling guide clamping device according to claim 1, characterized in that: The gap between the drill sleeve and the shaft of the tool is between 0.015 and 0.03 mm.

5. The high-precision drilling guide clamping device according to claim 1, characterized in that: The right end of the outer sleeve is provided with 4-8 narrow slots, and the outer side of the outer sleeve is provided with a groove for placing a clamp. The width of each narrow slot is 2-3 mm, and the depth is 1 cm deeper than the groove. There is a crack stop hole at the terminal. The right end of the outer sleeve is fixed to the main shaft of the drilling machine or the main shaft end of the power head through the clamp.

6. The high-precision drilling guide clamping device according to claim 1, characterized in that: The left end of the outer sleeve blocks the left shoulder of the second cylindrical tail portion of the inner sleeve by installing a pressure plate.

7. The high-precision drilling guide clamping device according to claim 1, characterized in that: The inner sheath is a stepped structure, the small diameter portion is used to install the spring, and the large diameter portion is installed in cooperation with the outer sheath.

8. The high-precision drilling guide clamping device according to any one of claims 1 to 7, characterized in that: The clamping device also includes a hole retaining ring, which is installed through a mounting groove on the outer sleeve to limit the inner sleeve.

9. The high-precision drilling guide clamping device according to any one of claims 1 to 7, characterized in that: An oil cup is arranged above the outer sleeve for injecting lubricating grease into the sliding surfaces of the inner sleeve and the outer sleeve.

10. The high-precision drilling guide clamping device according to any one of claims 1 to 7, characterized in that: The clamping device can be used for chamfering and tapping of drill holes, bores and hole ends.

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