Spline type workpiece fixing device for numerical control cylindrical grinding machine

Abstract

The utility model belongs to the technical field of numerical control cylindrical grinding machine accessories, and discloses a spline type workpiece fixing device for a numerical control cylindrical grinding machine, which comprises a main shaft center and a tailstock center which are coaxially arranged, and the fixed ends of the main shaft center and the tailstock center are both fixed on the numerical control cylindrical grinding machine. The tip end of the main shaft tip is provided with a fixing piece used for axially rotating and fixing the workpiece with the spline. The utility model overcomes the defect that the workpiece with the spline cannot be processed and formed at one time, does not need to be contacted with the excircle of the workpiece with the spline, and is connected with a numerical control cylindrical grinding machine through the spline, so that the grinding efficiency of the workpiece with the spline is improved.

Description

Technical Field

[0001] This utility model relates to the field of accessories technology for CNC cylindrical grinding machines, and in particular to a workpiece fixing device with splines for CNC cylindrical grinding machines. Background Technology

[0002] The double center fixing device mainly consists of a front center and a rear center, which are respectively installed on the spindle and tailstock of the CNC cylindrical grinding machine. The front center is usually inserted into the tapered hole of the spindle, while the rear center is inserted into the sleeve of the tailstock. The main functions of the centers are to center the workpiece and bear the weight and cutting force of the workpiece, ensuring the stability and accuracy of the workpiece during the machining process.

[0003] like Figure 1 As shown, in the traditional fixing device, the spindle lever 8 is connected to the traditional fixing part 5 (such as the outer circle clamp of the chuck, the retaining screw fixing ring, etc.) to fix the axial rotation of the splined workpiece 4. The two ends of the splined workpiece 4 are fastened and fixed by the spindle center 1 and the tailstock center 2. During the processing, the grinding wheel 3 will have the problem that the clamping part of the traditional fixing part 5 cannot be processed. Moreover, the traditional fixing part 5 is fixed by contact with the outer surface, so the splined workpiece 4 needs to be rotated for processing and cannot be ground into shape in one go. Utility Model Content

[0004] The main technical problem to be solved by this utility model is to provide a workpiece fixing device with splines for CNC cylindrical grinding machine, which overcomes the defect that splined workpieces cannot be machined in one step. It does not need to contact the outer circle of the splined workpiece, but is connected to the CNC cylindrical grinding machine through splines, thereby improving the grinding efficiency of splined workpieces.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A workpiece fixing device with splines for a CNC cylindrical grinding machine includes a spindle center and a tailstock center arranged coaxially. The fixed ends of the spindle center and the tailstock center are both fixed on the CNC cylindrical grinding machine. The tip of the spindle center is provided with a fixing element for axially rotating and fixing the workpiece with splines.

[0007] The following are further optimizations of the above technical solution by this utility model:

[0008] The fixing component includes a positioning ring sleeve fitted on the outside of the spindle tip. The end of the positioning ring sleeve near the tailstock tip is fixed with a number of positioning teeth that are equally spaced. The distance between two adjacent positioning teeth is adapted to the spline on the spline-type workpiece.

[0009] Further optimization: The CNC cylindrical grinding machine is fixed with a spindle and a tailstock arranged opposite to each other. The fixed end of the spindle tip is fixed to the inner wall of the spindle, and the fixed end of the tailstock tip is fixed to the inner wall of the tailstock.

[0010] Further optimization: A spindle lever is fixed on one side of the spindle tip, the spindle lever extends along the axial direction of the spindle tip, and one end of the spindle lever is fixed to the inner wall of the spindle.

[0011] Further optimization: A limiting rod is fixed on the side wall of the positioning ring cylinder. The limiting rod extends radially along the positioning ring cylinder and presses against the side wall of the main shaft lever.

[0012] The present invention adopts the above technical solution and has the following beneficial effects:

[0013] 1. The present invention adopts the above-mentioned technical solution, which is ingenious and reasonable in structure. By connecting the spline with the CNC cylindrical grinding machine, the axial rotation and fixation of splined workpieces can be realized. During processing, splined workpieces can be ground without being turned over, thus overcoming the defect that splined workpieces cannot be processed into shape in one step.

[0014] 2. This utility model connects the spline on the splined workpiece to the positioning teeth on the fixed part, thereby realizing the connection between the splined workpiece and the CNC cylindrical grinding machine. The installation and operation of the workpiece is simple and convenient, and it can achieve one-time grinding and forming, thus improving the grinding efficiency of splined workpieces. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an assembly diagram illustrating how traditional fasteners secure a workpiece.

[0017] Figure 2 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0018] Figure 3 This is a structural schematic diagram of the fixing component in an embodiment of this utility model.

[0019] In the diagram: 1. Spindle center; 2. Tailstock center; 3. Grinding wheel; 4. Splined workpiece; 5. Fixing component; 51. Positioning ring cylinder; 52. Positioning gear; 53. Limiting rod; 6. Spindle; 7. Tailstock; 8. Spindle lever. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 2 and Figure 3 As shown, a splined workpiece fixing device for a CNC cylindrical grinding machine includes a spindle center 1 and a tailstock center 2 arranged coaxially. The fixed ends of the spindle center 1 and the tailstock center 2 are both fixed on the CNC cylindrical grinding machine. The tip of the spindle center 1 is provided with a fixing member 5 for axially rotating and fixing the splined workpiece 4.

[0022] In this embodiment, the spindle center 1 and the tailstock center 2 clamp and fix the two ends of the splined workpiece 4.

[0023] like Figure 1 As shown, a retaining screw retaining ring is used as a fixing component 5. The retaining screw retaining ring consists of a metal spring, a compression spring and a housing. Its working principle is to utilize the elastic deformation characteristics of the metal spring and the compression spring. When the splined workpiece 4 is subjected to vibration or impact, the retaining screw retaining ring will generate a reaction force to firmly fix the splined workpiece 4 in its original position, thus preventing the splined workpiece 4 from loosening.

[0024] However, the inner wall of the retaining screw fixing ring is clamped on the outer circle of the splined workpiece 4. The part of the retaining screw fixing ring that holds the splined workpiece 4 cannot be ground. Therefore, the splined workpiece 4 needs to be rotated and fixed again before secondary grinding.

[0025] In this invention, the splined workpiece 4 can be engaged with the splines on the CNC cylindrical grinding machine without needing to be machined. All positions on the outer circle of the splined workpiece 4 can be machined, so the splined workpiece 4 does not need to be rotated during processing. This overcomes the defect that the splined workpiece 4 cannot be ground into shape in one pass due to the use of traditional fixing parts 5.

[0026] Meanwhile, the method of rotating the splined workpiece 4 before fixing it for processing may result in the problem of fixing the splined workpiece 4 on different axes twice. However, the one-time forming processing method in this utility model ensures the coaxiality of all outer circles of the splined workpiece 4 during processing.

[0027] The fixing component 5 includes a positioning ring cylinder 51 sleeved on the outside of the spindle tip 1. A number of positioning teeth 52 are fixed at one end of the positioning ring cylinder 51 near the tailstock tip 2. The distance between two adjacent positioning teeth 52 is adapted to the spline on the spline-type workpiece 4.

[0028] In this embodiment, the fastener 5 is suitable for shaft workpieces of different specifications and sizes, and is especially suitable for workpieces with splines (i.e. spline workpiece 4).

[0029] In this embodiment, the fixing member 5 uses the positioning teeth 52 to engage with the splines on the splined workpiece 4, without needing to contact the outer circle of the splined workpiece 4, thus avoiding the problem of deformation of the splined workpiece 4 due to contact with the outer circle.

[0030] In this embodiment, the positioning teeth 52 enable the axial rotational fixation of the spline-type workpiece 4.

[0031] like Figure 2 As shown, a CNC cylindrical grinding machine is fixed with a spindle 6 and a tailstock 7 arranged opposite to each other. The fixed end of the spindle center 1 is fixed on the inner wall of the spindle 6, and the fixed end of the tailstock center 2 is fixed on the inner wall of the tailstock 7.

[0032] In this embodiment, a grinding wheel 3 is provided on one side of the spindle 6 and the tailstock 7, and the grinding wheel 3 is used to grind the splined workpiece 4 fixed between the spindle 6 and the tailstock 7.

[0033] In this embodiment, the mounting principles of the spindle 6 and tailstock 7 on the CNC cylindrical grinding machine, as well as the mounting structure and working principle of the grinding wheel 3, are all existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0034] Furthermore, a spindle lever 8 is fixed on one side of the spindle tip 1. The spindle lever 8 extends along the axial direction of the spindle tip 1, and one end of the spindle lever 8 is fixed to the inner wall of the spindle 6.

[0035] In this embodiment, the spindle lever 8 serves to position and drive the fixing member 5.

[0036] In addition, a limiting rod 53 is fixed on the side wall of the positioning ring cylinder 51. The limiting rod 53 extends radially along the positioning ring cylinder 51 and presses against the side wall of the main shaft lever 8.

[0037] In this embodiment, the spindle lever 8 presses against the side wall of the limiting lever 53.

[0038] When the spindle 6 of the CNC cylindrical grinding machine rotates at high speed, the spindle lever 8 pushes the limit lever 53 to drive the positioning ring cylinder 51 to rotate synchronously, thereby driving the splined workpiece 4 to rotate. The grinding wheel 3 on one side feeds forward to achieve the grinding of the outer circle of the splined workpiece 4.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A workpiece fixing device with splines for a CNC cylindrical grinding machine, characterized in that, The application relates to a coaxial main shaft center (1) and tailstock center (2), the fixed end of the main shaft center (1) and the tailstock center (2) is fixed on a numerical control cylindrical grinding machine, the tip of the main shaft center (1) is provided with a fixing piece (5) for axially rotating and fixing a workpiece (4) with a spline; The fixing piece (5) comprises a positioning ring cylinder (51) sleeved outside the main shaft center (1), a plurality of equidistantly arranged positioning teeth (52) are fixed to one end of the positioning ring cylinder (51) close to the tailstock center (2), and the spacing between the adjacent two positioning teeth (52) is matched with the spline on the workpiece (4) with a spline.

2. The fixing device for workpieces with splines of a numerically controlled cylindrical grinder according to claim 1, characterized in that, The numerical control cylindrical grinding machine is provided with a main shaft (6) and a tailstock (7) oppositely arranged on the left and right, the fixed end of the main shaft center (1) is fixed to the inner side wall of the main shaft (6), and the fixed end of the tailstock center (2) is fixed to the inner side wall of the tailstock (7).

3. The fixing device for workpieces with splines of the numerically controlled cylindrical grinder according to claim 2, characterized in that, One side of the main shaft center (1) is fixed with a main shaft shifting rod (8), the main shaft shifting rod (8) extends along the axis direction of the main shaft center (1), and one end of the main shaft shifting rod (8) is fixed to the inner side wall of the main shaft (6).

4. The fixing device for workpieces with splines of the numerically controlled cylindrical grinder according to claim 3, characterized in that, The side wall of the positioning ring cylinder (51) is fixed with a limiting rod (53), the limiting rod (53) extends along the radial direction of the positioning ring cylinder (51), and the limiting rod (53) is pressed against the side wall of the main shaft shifting rod (8).

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