Automatic lathe and main shaft clamping device thereof

Abstract

The utility model discloses a precision automatic lathe and a spindle clamping device thereof. The spindle clamping device comprises a spindle guide sleeve, a workpiece clamping inlet seat, a three-jaw chuck, a spindle box and a pushing head. The main shaft guide sleeve is a hollow cylinder with openings at two ends, the workpiece clamping inlet seat and the three-jaw chuck are correspondingly fixed at the openings at the two ends of the main shaft guide sleeve respectively, so that a workpiece penetrates through an inner cavity of the main shaft guide sleeve from the workpiece clamping inlet seat and is exposed out of the three-jaw chuck, and the workpiece is clamped by the three-jaw chuck. The pushing head is connected to the workpiece clamping inlet seat through the connecting rod, moves along the connecting rod to be close to or far away from the workpiece clamping inlet seat, and is used for abutting against the tail end of the workpiece to prevent the workpiece from moving backwards under the acting force of a cutter in the machining process to be turned back; the three-jaw chuck and the abutting and pushing head are matched to play a fixing role in the axial direction and the radial direction of the axial workpiece which are perpendicular to each other, so that the machining qualification rate can be effectively guaranteed, and the workpiece defective product treatment cost caused by displacement is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of Swiss-type lathes, in particular to a Swiss-type lathe and a spindle clamping device thereof. Background Art

[0002] A Swiss-type CNC machine tool (Swiss CNC machine tool) is a type of automated machining equipment. Its main spindle drives the back-and-forth movement of an axial workpiece, feeding the workpiece into contact with a high-speed rotating tool for machining. The spindle also drives the workpiece's rotation, changing the circumferential machining point. Therefore, a Swiss-type CNC machine tool requires a spindle clamping device to secure the workpiece.

[0003] The spindle clamping device of a traditional Swiss-type lathe is generally only equipped with a chuck in the radial direction of the workpiece, and the chuck clamps the axial surface of the workpiece, while the workpiece mainly moves back and forth with the spindle. It is difficult to achieve stable clamping of the workpiece only by the function of the chuck. If the spindle clamping device does not have sufficient fixing effect on the workpiece, the workpiece may be turned back during processing, and the workpiece and the spindle may move relative to each other, which may cause the workpiece size to be incorrect, resulting in damage to the workpiece and affecting the qualified rate.

[0004] Therefore, it is necessary to improve the spindle clamping device of the traditional Swiss-type lathe to solve the above problems. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a Swiss-type lathe and a spindle clamping device thereof to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] The utility model firstly provides a spindle clamping device of a Swiss-type lathe, which comprises a spindle guide sleeve, a workpiece clamping entrance seat, a three-jaw chuck, a spindle box and a push head.

[0008] In which, the spindle guide sleeve is a hollow cylinder with openings at both ends, and the workpiece clamping entrance seat and the three-jaw chuck are respectively fixed at the openings at both ends of the spindle guide sleeve, so that the workpiece passes through the inner cavity of the spindle guide sleeve from the workpiece clamping entrance seat and is exposed outside the three-jaw chuck, and the three-jaw chuck is used to clamp the exposed head end of the workpiece by three jaws arranged thereon, and the spindle box is sleeved on the outside of the spindle guide sleeve so that the spindle box is clamped between the workpiece clamping entrance seat and the three-jaw chuck, and the spindle guide sleeve is rotatably connected to the spindle box, and the push head is connected to the workpiece clamping entrance seat through a connecting rod, and the push head moves along the connecting rod to approach or move away from the workpiece clamping entrance seat, and the push head is used to abut the end of the workpiece.

[0009] Preferably, a clearance opening for the workpiece to pass through is opened on the end face of the push head, and a baffle is rotatably connected to the end face of the push head through a screw. The baffle rotates around the screw and can selectively cover or expose the clearance opening of the push head.

[0010] Preferably, the inner cavity of the spindle guide sleeve is provided with a plurality of spring mounting grooves, each of which is provided with a spring connected to an abutment ball. The abutment ball extends from the spring mounting groove and is used to abut against the part of the workpiece in the inner cavity of the spindle guide sleeve, so as to clamp the workpiece through the cooperation of the plurality of abutment balls.

[0011] Preferably, every two spring installation grooves are relatively opened in the same radial direction of the spindle guide sleeve, and along the axial direction of the spindle guide sleeve, the projections of the spring installation grooves do not overlap with each other.

[0012] Preferably, the abutting ball is a ball made of silicone material.

[0013] Preferably, when the spring is at its original length, the height of the abutment ball extending out of the spring mounting slot is not greater than the radius of the abutment ball.

[0014] Preferably, both ends of the connecting rod are respectively locked on the workpiece clamping entrance seat and the pushing head through nuts.

[0015] The utility model also provides a Swiss-type lathe, which comprises the spindle clamping device as described above.

[0016] The technical effects achieved by the technical solution of this utility model mainly include:

[0017] The spindle clamping device of the Swiss machine uses a three-jaw chuck to clamp the workpiece loaded into the spindle guide sleeve, and a push head is provided which is movably connected to the end of the spindle guide sleeve through a connecting rod. After the three-jaw chuck clamps the workpiece, the push head can be moved along the connecting rod close to the workpiece clamping entrance seat to push against the end of the workpiece, preventing the workpiece from moving backward due to the force of the tool during the machining process. It is equivalent to providing a limiting structure for the workpiece in the axial and radial directions perpendicular to each other, which cooperate with each other to provide a fixing effect on the workpiece, thereby ensuring the qualified rate of workpiece machining and reducing the cost of discarding defective workpieces.

[0018] The inner cavity of the spindle guide sleeve is provided with a plurality of spring mounting grooves, and a spring connected to an abutment ball is installed in each spring mounting groove. The abutment ball extends from the spring mounting groove to abut against the part of the workpiece in the inner cavity of the spindle guide sleeve, so as to clamp the workpiece through the cooperation of the plurality of abutment balls, and also have a clamping and fixing effect on the middle section of the workpiece, so that the workpiece can be fixed at multiple distributed and dispersed points. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic structural diagram of the spindle clamping device of a Swiss-type lathe provided in an embodiment of the present utility model;

[0020] Figure 2 To correspond Figure 1 A partial enlarged view of the circular dotted box area A;

[0021] Figure 3 A schematic diagram of the baffle in the spindle clamping device abutting against a workpiece;

[0022] Figure 4 is a side view of the spindle clamping device;

[0023] Figure 5 To correspond Figure 4 Cross-sectional structural diagram of the cutting line AA'.

[0024] The reference numerals in the above drawings are:

[0025] Spindle guide sleeve 1, spring mounting groove 11, abutment ball 12, spring 13;

[0026] Workpiece clamping entrance seat 2;

[0027] Three-jaw chuck 3, jaws 31;

[0028] Spindle box 4;

[0029] Pushing head 5, yielding opening 50, connecting rod 51, baffle 52;

[0030] Workpiece 600. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the present invention shown in and described with reference to the accompanying drawings are merely exemplary, and the present invention is not limited to these embodiments.

[0032] Here, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the drawings, and other less relevant details are omitted.

[0033] like Figures 1 to 3 As shown, an embodiment of the present invention provides a spindle clamping device for a Swiss-type lathe, which includes a spindle guide sleeve 1, a workpiece clamping entrance seat 2, a three-jaw chuck 3, a spindle box 4 and a push head 5.

[0034] Among them, the spindle guide sleeve 1 is a hollow cylinder with openings at both ends, and the workpiece clamping entrance seat 2 and the three-jaw chuck 3 are respectively fixed at the openings at both ends of the spindle guide sleeve 1, so that the workpiece 600 passes through the inner cavity of the spindle guide sleeve 1 from the workpiece clamping entrance seat 2 and is exposed outside the three-jaw chuck 3.

[0035] Combine Figure 4 and Figure 5 As shown, the three-jaw chuck 3 is used to clamp the exposed head end of the workpiece 600 through three jaws 31 provided thereon.

[0036] The spindle box 4 is sleeved on the outside of the spindle guide sleeve 1, so that the spindle box 4 is clamped between the workpiece clamping entrance seat 2 and the three-jaw chuck 3. The spindle guide sleeve 1 is rotatably connected to the spindle box 4. The spindle box 4 can drive other components including the entire spindle clamping device and the workpiece 600 to move back and forth under the drive of the transfer mechanism such as the screw guide rail, and the spindle guide sleeve 1 can rotate relative to the spindle box 4 together with the fixed workpiece 600.

[0037] The abutting head 5 is connected to the workpiece clamping entrance seat 2 via a connecting rod 51 . The abutting head 5 moves along the connecting rod 51 to approach or move away from the workpiece clamping entrance seat 2 . The abutting head 5 is used to abut the end of the workpiece 600 .

[0038] The spindle clamping device of the above-mentioned Swiss-made lathe provided by the embodiment of the present invention, in addition to providing a radial clamping force for the workpiece 600 loaded into the spindle guide sleeve 1 through the three-jaw chuck 3, also provides a push head 5 at the end of the spindle guide sleeve 1. The push head 5 moves along the connecting rod 51 close to the workpiece clamping entrance seat 2 to push against the end of the workpiece 600, forming a stop structure for the workpiece 600, preventing the workpiece 600 from moving backward under the action of the tool during the machining process, causing the workpiece 600 to move backward and cause the turning to be incorrect. The time and cost invested in the care and maintenance of the Swiss-made lathe are reduced, and the processing cost invested in the workpiece 600 due to the turning backward is reduced.

[0039] Combine Figure 1 and Figure 3As shown, since the position of the push head 5 is in the axial direction of the spindle guide sleeve 1, in order to facilitate the smooth installation of the workpiece 600 into the spindle guide sleeve 1, a clearance opening 50 for the workpiece 600 to pass through is opened on the end face of the push head 5, and the clearance opening 50 is located in the axial direction of the spindle guide sleeve 1. A baffle 52 is also rotatably connected to the end face of the push head 5 by a screw. The baffle 52 rotates around the screw and can selectively cover or expose the clearance opening 50 of the push head 5. When it is necessary to load the workpiece 600 into the spindle guide sleeve 1, it is only necessary to rotate the baffle 52 to expose its clearance opening 50, and then pass the workpiece 600 through the clearance opening 50 and send it to the workpiece clamping entrance seat 2, and then it can be inserted into the spindle guide sleeve 1. After the workpiece 600 has completely passed through the clearance opening 50 of the push head 5, the baffle 52 can be rotated to reclose the clearance opening 50, and then the push head 5 can be adjusted to move along the connecting rod 51 to abut the end of the workpiece 600. There is no need to perform too much disassembly and assembly of the push head 5, and the workpiece can be conveniently loaded.

[0040] like Figure 5 As shown, in order to further improve the clamping and fixing effect of the middle section of the workpiece 600, the inner cavity of the spindle guide sleeve 1 is provided with a plurality of spring mounting grooves 11. A spring 13 connected to an abutment ball 12 is installed in each of the spring mounting grooves 11. The abutment ball 12 extends from the spring mounting groove 11 and is used to abut the portion of the workpiece 600 in the inner cavity of the spindle guide sleeve 1, so as to clamp the workpiece 600 through the cooperation of the plurality of abutment balls 12. Since the abutment balls 12 are spherical, when the workpiece 600 contacts the spherical surface of the abutment balls 12 through the spindle guide sleeve 1, the abutment balls 12 are forced to be squeezed back into the spring mounting groove 11. The workpiece 600 can pass normally with the abutment balls 12 pressing on its axial surface, and the forward extension of the workpiece 600 will not be hindered.

[0041] Specifically, in this embodiment, each pair of spring mounting grooves 11 are positioned relative to each other along the same radial direction of the spindle guide sleeve 1. The abutment balls 12 in each pair of spring mounting grooves 11 are grouped together, and the abutment balls 12 in the same group exert opposing forces on the workpiece 600, thereby clamping and securing the workpiece 600 in a single radial direction. Furthermore, along the axial direction of the spindle guide sleeve 1, the projections of the individual spring mounting grooves 11 do not overlap, enabling corresponding groups of abutment balls 12 to be arranged in multiple locations at different radial directions. The figure illustrates only two groups of spring mounting grooves 11 in the same radial direction.

[0042] For example, the abutment balls 12 are made of silicone material. The silicone abutment balls 12 can maintain a high friction force when in contact with the workpiece 600, while its elasticity can reduce the possibility of damage such as imprinting caused by the abutment balls 12 on the workpiece 600 during construction, thereby reducing the clamping force required by the three-jaw chuck 3.

[0043] The two ends of the connecting rod 51 are respectively locked to the workpiece clamping entrance seat 2 and the push head 5 through nuts. When the push head 5 needs to be moved, the limit lock on the connecting rod 51 can be released by loosening the nuts corresponding to the push head 5.

[0044] An embodiment of the present utility model further provides a Swiss-type lathe, which includes the spindle clamping device as described above.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0046] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A spindle clamping device for a Swiss-type lathe, characterized in that: It includes a spindle guide sleeve (1), a workpiece clamping entrance seat (2), a three-jaw chuck (3), a spindle box (4) and a push head (5). The spindle guide sleeve (1) is a hollow cylinder with openings at both ends, and the workpiece clamping entrance seat (2) and the three-jaw chuck (3) are respectively fixed at the openings at both ends of the spindle guide sleeve (1), so that the workpiece (600) passes through the inner cavity of the spindle guide sleeve (1) from the workpiece clamping entrance seat (2) and is exposed outside the three-jaw chuck (3). The three-jaw chuck (3) is used to clamp the exposed head end of the workpiece (600) through three jaws (31) provided thereon. The spindle box (4) is sleeved on the outside of the spindle guide sleeve (1), so that the spindle box (4) is clamped between the workpiece clamping entrance seat (2) and the three-jaw chuck (3), and the spindle guide sleeve (1) is rotatably connected to the spindle box (4). The abutting head (5) is connected to the workpiece clamping entrance seat (2) via a connecting rod (51), and the abutting head (5) moves along the connecting rod (51) to approach or move away from the workpiece clamping entrance seat (2). The abutting head (5) is used to abut the end of the workpiece (600).

2. The spindle clamping device of a Swiss-type lathe according to claim 1, characterized in that: The end surface of the push head (5) is provided with a clearance opening (50) for the workpiece (600) to pass through, and the end surface of the push head (5) is also rotatably connected to a baffle (52) via a screw, and the baffle (52) rotates around the screw to selectively cover or expose the clearance opening (50) of the push head (5).

3. The spindle clamping device of a Swiss-type lathe according to claim 1, characterized in that: The inner cavity of the spindle guide sleeve (1) is provided with a plurality of spring mounting grooves (11), each of the spring mounting grooves (11) being provided with a spring (13) connected to an abutting ball (12), the abutting ball (12) extending from the spring mounting groove (11) and being used for abutting against a portion of the workpiece (600) in the inner cavity of the spindle guide sleeve (1), so as to clamp the workpiece (600) through the cooperation of the plurality of abutting balls (12).

4. The spindle clamping device of a Swiss-type lathe according to claim 3, characterized in that: Every two spring installation grooves (11) are relatively opened in the same radial direction of the main shaft guide sleeve (1), and along the axial direction of the main shaft guide sleeve (1), the projections of the spring installation grooves (11) do not overlap with each other.

5. The spindle clamping device of a Swiss-type lathe according to claim 3, characterized in that: The abutting ball (12) is a ball made of silicone material.

6. The spindle clamping device of a Swiss-type lathe according to claim 3, characterized in that: When the spring (13) is at its original length, the height of the abutting ball (12) extending out of the spring mounting slot (11) is no greater than the radius length of the abutting ball (12).

7. The spindle clamping device of a Swiss-type lathe according to claim 1, characterized in that: The two ends of the connecting rod (51) are respectively locked on the workpiece clamping entrance seat (2) and the push head (5) through nuts.

8. A Swiss-type lathe, characterized in that: It comprises the spindle clamping device according to any one of claims 1 to 7.

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