Positioning tool of vertical grinding machine

Abstract

The utility model provides a positioning tool of a vertical grinding machine, and belongs to the technical field of machine tool equipment. The problem that the workpiece machining efficiency is low when inner circles of workpieces are machined on an existing vertical grinding machine on a large scale is solved. The positioning tool of the vertical grinding machine is installed on a rotary working table of the vertical grinding machine and comprises two base plates fixedly connected to the upper surface of the rotary working table, the two base plates are both in a strip shape and arranged in the radial direction of the rotary working table, and the two base plates are arranged in the circumferential direction of the rotary working table. Each base plate is provided with a positioning block capable of sliding in the radial direction of the rotating table, each positioning block is fixedly connected to the corresponding base plate through a connecting bolt, and the face, facing the center of the rotating table, of each positioning block is a protruding arc cylindrical face. According to the positioning tool of the vertical grinding machine, the machining efficiency during large-batch workpiece machining is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool tooling equipment and relates to a positioning tooling for a vertical grinding machine. Background Technique

[0002] The vertical grinding machine, abbreviated as vertical grinder, is used for grinding workpieces. The vertical grinding machine includes a rotary table and a grinding head. The rotary table is horizontally installed and can rotate, and the grinding head is vertically installed and can move up and down and horizontally. During operation, the workpiece is fixed on the rotary table and rotates, and the grinding head moves up and down and horizontally to grind the inner circle, outer circle or end face of the workpiece.

[0003] The workpiece is mainly fixed on the rotary table by magnetic adsorption, such as the patent literature with the publication number of CN201295837Y or CN202106296U. The rotary table is provided with an electromagnetic device, which generates magnetic force when powered on to adsorb the workpiece on the rotary table, and the magnetic force disappears when powered off, and the workpiece can be removed from the rotary table. At present, when using a vertical grinding machine to grind the inner circle of a workpiece, it is necessary to align the center of the workpiece with the rotation center of the rotary table, that is, it is necessary to find the correct position and center the workpiece before grinding. There is no positioning device on the existing magnetic adsorption type rotary table. Each workpiece can only be re-aligned manually before processing, and the efficiency is low. Especially for workpieces with large batch processing, the alignment work will take a long time, reducing the processing efficiency of the workpiece. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems existing in the prior art, and provide a positioning tooling for a vertical grinding machine, which solves the technical problem of low processing efficiency of workpieces when grinding the inner circles of workpieces in large batches on the existing vertical grinding machine.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A positioning tooling for a vertical grinding machine is installed on the rotary table of the vertical grinding machine and includes two backing plates fixedly connected to the upper surface of the rotary table. It is characterized in that both backing plates are strip-shaped and arranged along the radial direction of the rotary table, the two backing plates are arranged circumferentially along the rotary table, a positioning block capable of sliding along the radial direction of the rotary table is arranged on each backing plate, each positioning block is fixedly connected to the corresponding backing plate through a connecting bolt, and one side of each positioning block facing the center of the rotary table is a convex arc cylindrical surface.

[0007] When machining the inner circle of a large batch of workpieces, before machining the first product, fix two backing plates to the rotary worktable; then slide the positioning block so that the distance from the side of the positioning block facing the center of the rotary worktable to the center of the rotary worktable is equal to the radius of the outer circle of the workpiece, and then fix the positioning block on the backing plate through the connecting bolts; then place the workpiece on the rotary worktable and push the workpiece so that the outer circle of the workpiece abuts against the sides of the two positioning blocks facing the center of the rotary worktable. Since the side of the positioning block facing the center of the rotary worktable is an arc cylindrical surface, the outer circle of the workpiece is tangent to the side of the positioning block facing the center of the rotary worktable, and theoretically the center of the workpiece coincides with the center of the rotary worktable. Due to the existence of installation errors, correction is still required. The electromagnetic device of the rotary worktable is powered on to adsorb and fix the workpiece on the rotary worktable, and then the rotary worktable rotates to measure the outer circle runout of the workpiece; if the outer circle runout of the workpiece meets the error requirements, machining of the workpiece can start; if the outer circle runout error is large, after powering off the electromagnetic device of the rotary worktable, loosen the connecting bolts and finely adjust the position of the positioning block on the backing plate until the outer circle runout meets the error requirements.

[0008] After the correction is completed, the inner circle of the workpiece can be machined in large batches. During machining, only place the workpiece on the rotary worktable, make the outer circle of the workpiece abut against the sides of the two positioning blocks facing the center of the rotary worktable, and then fix the workpiece by magnetic adsorption. When using the positioning tooling of this vertical grinding machine to machine the inner circle of workpieces in large batches, only the first workpiece needs to be aligned, and other workpieces can be centered by using the positioning tooling without alignment. Compared with the existing situation where each workpiece needs to be aligned, the alignment time is greatly reduced, and the machining efficiency during the machining of large batches of workpieces is improved.

[0009] In the positioning tooling of the above-mentioned vertical grinding machine, the lower surface of each positioning block abuts against the upper surface of the corresponding backing plate. The upper surface of each backing plate has protruding guide strips arranged along the radial direction of the rotary worktable, and the lower end of each positioning block has guide walls that respectively abut against the two side surfaces of the guide strips.

[0010] The cooperation between the guide strips and the guide walls has a guiding effect on the positioning block, enabling the positioning block to accurately slide along the radial direction of the rotary worktable on the backing plate, facilitating the operation during workpiece alignment; at the same time, the cooperation between the guide strips and the guide walls has a circumferential positioning effect on the positioning block, preventing the positioning block from rotating during movement or after being fixed, and ensuring the stability of the positioning of the positioning block.

[0011] In the positioning tooling of the above-mentioned vertical grinding machine, each positioning block is provided with a strip-shaped hole arranged along the radial direction of the rotary worktable. The connecting bolt is inserted into the strip-shaped hole and is threadedly connected to the backing plate, and the connecting bolt can slide in the strip-shaped hole.

[0012] When fine-tuning the position of the positioning block, loosen the connecting bolt, move the positioning block so that the connecting bolt slides in the strip-shaped hole. After adjustment, tighten the connecting bolt again. During adjustment, there is no need to disassemble the connecting bolt, only loosen and tighten operations are required, which is convenient for adjustment.

[0013] In the positioning tooling of the vertical grinding machine described above, on the same positioning block, the two guiding walls are respectively flush with the two side surfaces of the strip-shaped hole. This makes it convenient to machine the guiding walls and the strip-shaped hole.

[0014] In the positioning tooling of the vertical grinding machine described above, one side of the strip-shaped hole facing away from the center of the rotary table penetrates through the positioning block and forms an opening on the positioning block.

[0015] When replacing the positioning block when processing products with different sizes and structures, screw out the connecting bolt and remove the positioning block, then connect the connecting bolt to a suitable position on the backing plate, align the opening of the new positioning block with the connecting bolt, move the new positioning block away from the center of the rotary table, insert the connecting bolt into the strip-shaped hole, and then tighten the connecting bolt. When replacing the positioning block, the connecting bolt can be installed on the backing plate first and then the positioning block, avoiding the situation that the positioning block blocks the threaded hole on the backing plate and causing inconvenience in connecting the connecting bolt to the backing plate, making the replacement operation convenient.

[0016] In the positioning tooling of the vertical grinding machine described above, an avoidance notch is provided on the lower surface of the positioning block.

[0017] Magnetic conductive blocks are also arranged on the upper surface of the rotary table. The avoidance notch is used to avoid the magnetic conductive blocks, ensuring the magnetic adsorption fixing effect of the rotary table and making the workpiece fixed stably on the rotary table.

[0018] In the positioning tooling of the vertical grinding machine described above, the cross-section of each guiding strip is an inverted isosceles trapezoid. The connecting bolt is threadedly connected to the positioning block, and the bottom of the connecting bolt abuts against the backing plate.

[0019] When fine-tuning the position of the positioning block, loosen the connecting bolt. When moving the positioning block, the connecting bolt moves with the positioning block. After adjustment, tighten the connecting bolt again. During adjustment, there is no need to disassemble the connecting bolt, only loosen and tighten operations are required, which is convenient for adjustment.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] When using the positioning tooling of this vertical grinding machine to mass-produce the inner circle of workpieces, only the first workpiece needs to be aligned and debugged, and other workpieces can be centered by using the positioning tooling without alignment. Compared with the situation where each workpiece needs to be aligned in the prior art, the alignment time is greatly reduced, and the processing efficiency of the workpieces is improved. When fine-tuning the position of the positioning block, only loosen and tighten the connecting bolt, there is no need to disassemble the connecting bolt, and the adjustment is convenient. Brief Description of the Drawings

[0022] Figure 1 Fig. 5 is a perspective view of the first embodiment of the positioning tooling of the vertical grinding machine when installed on the rotary table.

[0023] Figure 2 Fig. 6 is a perspective view of a combination of a backing plate and a positioning block in the first embodiment of the positioning tooling of the vertical grinding machine.

[0024] Figure 3 Fig. 7 is a bottom view of the positioning block in the first embodiment of the positioning tooling of the vertical grinding machine.

[0025] In the figures, 1 is the rotary table; 1a is the T-slot; 2 is the magnetic conductive block; 3 is the backing plate; 3a is the guide bar; 3b is the threaded hole; 4 is the positioning block; 4a is the guide wall; 4b is the strip hole; 4c is the opening; 4d is the avoidance notch; 5 is the connecting bolt; 6 is the T-block; 7 is the mounting bolt; 8 is the workpiece. Detailed Description of the Preferred Embodiments

[0026] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0027] Embodiment 1

[0028] As Figure 1 shown, a positioning tooling for a vertical grinding machine is installed on the rotary table 1 of the vertical grinding machine, and includes two backing plates 3 fixedly connected to the upper surface of the rotary table 1. Both backing plates 3 are strip-shaped and arranged along the radial direction of the rotary table 1, and the two backing plates 3 are arranged in sequence along the circumferential direction of the rotary table 1. The included angle between the two backing plates 3 is 60° - 150°, such as 90°, 120° or 135°. A plurality of magnetic conductive blocks 2 are fixedly arranged on the upper surface of the rotary table 1, and the workpiece 8 is placed on the magnetic conductive blocks 2. The upper surface of the backing plate 3 is lower than the upper surface of the magnetic conductive blocks 2. The rotary table 1 is provided with T-slots 1a, and there are several T-slots 1a arranged uniformly along the circumferential direction. A T-block 6 corresponding to the T-slot 1a is arranged below the backing plate 3, and the T-block 6 is embedded in the T-slot 1a. The mounting bolt 7 passes through the backing plate 3 and is threadedly connected to the T-block 6. After the mounting bolt 7 is tightened, the backing plate 3 is fixedly connected to the rotary table 1. Each backing plate 3 is connected with three T-blocks 6 and three mounting bolts 7. In order to make the backing plate 3 fixed stably, the backing plate 3 is also fixedly connected to the rotary table 1 through a fixing bolt. A countersunk hole is provided on the backing plate 3, and the fixing bolt passes through the countersunk hole and is threadedly connected to the rotary table 1.

[0029] Combined with Figure 2 and Figure 3As shown in the figure, a positioning block 4 capable of sliding radially along the rotary table 1 is provided on each backing plate 3. Each positioning block 4 is fixedly connected to the corresponding backing plate 3 by a connecting bolt 5. The surface of each positioning block 4 facing the center of the rotary table 1 is a protruding arc cylindrical surface. The lower surface of the positioning block 4 abuts against the upper surface of the backing plate 3. On the upper surface of each backing plate 3, there is a protruding guiding strip 3a arranged along the radial direction of the rotary table 1. At the lower end of each positioning block 4, there are guiding walls 4a respectively abutting against the two side surfaces of the guiding strip 3a. A threaded hole 3b matching the connecting thread is formed in each backing plate 3. There are several connecting bolts 5 arranged in sequence along the length direction of the backing plate 3. The connecting bolt 5 can form a threaded connection with any one of the threaded holes 3b. A strip-shaped hole 4b arranged along the radial direction of the rotary table 1 is formed in each positioning block 4. The connecting bolt 5 passes through the strip-shaped hole 4b and is threadedly connected to the threaded hole 3b of the backing plate 3. The connecting bolt 5 can slide in the strip-shaped hole 4b. Two or three connecting bolts 5 are arranged in each strip-shaped hole 4b. On the same positioning block 4, the two guiding walls 4a are respectively flush with the two side surfaces of the strip-shaped hole 4b. One side of the strip-shaped hole 4b facing away from the center of the rotary table 1 penetrates through the positioning block 4 and forms an opening 4c on the positioning block 4. An avoidance notch 4d is arranged on the lower surface of the positioning block 4. Avoidance notches are arranged on both sides of the backing plate 3. The avoidance notch 4d and the avoidance notches are both used to avoid the magnetic conduction block 2.

[0030] When machining the inner circle of a large number of workpieces 8, before machining the first product, two backing plates 3 are fixedly connected to the rotary table 1, and the included angle between the two backing plates 3 is 135°. Then loosen the connecting bolt 5 and slide the positioning block 4 so that the distance from the surface of the positioning block 4 facing the center of the rotary table 1 to the center of the rotary table 1 is equal to the radius of the outer circle of the workpiece 8. Then tighten the connecting bolt 5 to fix the positioning block 4 on the backing plate 3. Then place the workpiece 8 on the rotary table 1. The bottom end surface of the workpiece 8 abuts against the magnetic conduction block 2. Then push the workpiece 8 between the two positioning blocks 4, and the outer circle of the workpiece 8 abuts against the surfaces of the two positioning blocks 4 facing the center of the rotary table 1. Due to the existence of installation errors, correction is still required. The electromagnetic device of the rotary table 1 is energized to adsorb and fix the workpiece 8 on the magnetic conduction block 2 of the rotary table 1. Then the rotary table 1 rotates. Since the top end of the workpiece 8 is higher than the positioning block 4, the outer circle runout at the top end of the workpiece 8 can be measured. For those with outer circle runout meeting the error requirements, machining of the workpiece 8 can be started. For those with larger outer circle runout errors, after the electromagnetic device of the rotary table 1 is powered off, loosen the connecting bolt 5 and finely adjust the position of the positioning block 4 on the backing plate 3 until the outer circle runout meets the error requirements.

[0031] After calibration, the inner circle of the workpiece 8 can be machined in large quantities. During machining, only need to place the workpiece 8 on the rotary table 1, and make the outer circle of the workpiece 8 abut against the surfaces of the two positioning blocks 4 facing the center of the rotary table 1, and then fix the workpiece 8 by magnetic attraction. When machining the inner circle of the workpiece 8 in large quantities by using the positioning tooling of this vertical grinding machine, only the first workpiece 8 needs to be aligned, and the other workpieces 8 can be centered by using the positioning tooling without alignment. Compared with the existing situation where each workpiece 8 needs to be aligned, the alignment time is greatly reduced, and the machining efficiency of the workpiece 8 is improved.

[0032] Embodiment 2

[0033] The cross-section of the guide bar 3a is in the shape of a dovetail, that is, an inverted isosceles trapezoid. The connecting bolt 5 is threadedly connected to the positioning block 4, and the bottom of the connecting bolt 5 abuts against the guide bar 3a of the backing plate 3. Other structures are the same as those in Embodiment 1.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A positioning tooling for a vertical grinding machine, which is installed on a rotary table (1) of the vertical grinding machine, and comprises two backing plates (3) fixedly connected to the upper surface of the rotary table (1), and is characterized in that, The two backing plates (3) are both strip-shaped and arranged along the radial direction of the rotary table (1). The two backing plates (3) are arranged circumferentially along the rotary table (1). Each backing plate (3) is provided with a positioning block (4) capable of sliding along the radial direction of the rotary table (1). Each positioning block (4) is fixedly connected to the corresponding backing plate (3) through a connecting bolt (5). The surface of each positioning block (4) facing the center of the rotary table (1) is a protruding arc-shaped cylindrical surface.

2. The positioning tooling of the vertical grinding machine according to claim 1, characterized in that, The lower surface of each positioning block (4) abuts against the upper surface of the corresponding backing plate (3). The upper surface of each backing plate (3) has a protruding guide strip (3a) arranged along the radial direction of the rotary table (1). The lower end of each positioning block (4) has a guide wall (4a) respectively abutting against the two side surfaces of the guide strip (3a).

3. The positioning tooling for the vertical grinding machine according to claim 2, characterized in that, Each positioning block (4) is provided with a strip-shaped hole (4b) arranged along the radial direction of the rotary table (1). The connecting bolt (5) is inserted into the strip-shaped hole (4b) and is threadedly connected to the backing plate (3). The connecting bolt (5) can slide in the strip-shaped hole (4b).

4. The positioning tooling for the vertical grinding machine according to claim 3, wherein, On the same positioning block (4), the two guide walls (4a) are flush with the two side surfaces of the strip-shaped hole (4b) respectively.

5. The positioning tooling of the vertical grinding machine according to claim 3, characterized in that, The side of the strip-shaped hole (4b) facing away from the center of the rotary table (1) penetrates through the positioning block (4) and forms an opening (4c) on the positioning block (4).

6. The positioning tooling for the vertical grinding machine according to any one of claims 1-5, characterized in that, A relief notch (4d) is provided on the lower surface of the positioning block (4).

7. The positioning tooling for the vertical grinding machine according to claim 2, characterized in that The cross-section of each guide strip (3a) is an inverted isosceles trapezoid. The connecting bolt (5) is threadedly connected to the positioning block (4), and the bottom of the connecting bolt (5) abuts against the backing plate (3).

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