An internal hole surface grinding device with a chuck clamping mechanism

Abstract

This invention relates to the field of grinding apparatus, and in particular to an internal hole surface grinding apparatus with a chuck clamping mechanism, comprising a frame; a slide module and a tool post module disposed on the frame; a spindle module disposed on the slide module for clamping and fixing the workpiece, the spindle module and the tool post module being coaxially disposed; and a clamping guide module disposed on the tool post module, the clamping guide module comprising a follower guide component, the follower guide component being used to clamp the workpiece as the spindle module feeds towards the tool post module, and a circumferential limiting guide control component for the workpiece, the control component being used to control the follower guide component to clamp the end of the workpiece as the spindle module feeds; by setting the clamping guide module, the clamping and releasing actions of the workpiece are completely integrated into the feed and retraction process of the electric slide, completely eliminating the separate center rest clamping and releasing process, and realizing seamless connection between machining actions and auxiliary actions.

Description

Technical Field

[0001] This invention relates to the field of grinding apparatus, and in particular to an internal hole surface grinding apparatus with a chuck clamping mechanism. Background Technology

[0002] Currently, the industry commonly uses a horizontal single-end clamping machining solution for grinding the inner hole of the axial mounting hole of the cylinder piston rod. This solution clamps one end of the piston rod onto a rotating spindle using a three-jaw chuck, with the spindle module mounted on a linear electric slide. During machining, the spindle drives the piston rod to rotate at high speed, while the electric slide drives the spindle module to feed axially towards the fixed tool holder module, causing the grinding head on the tool holder to gradually extend into the axial mounting hole of the piston rod. The high-speed rotation and grinding action remove the machining allowance and surface defects from the inner hole surface. However, current piston rod grinding equipment still has certain shortcomings: To overcome the radial runout, vibration, and elastic bending deformation problems caused by the suspended end of the piston rod under single-end clamping, a follower center rest is usually added to the machining path to provide radial support for the piston rod throughout the feed process. However, the clamping and releasing actions of the follower center rest need to be driven by an independent power source. After the chuck clamps the workpiece, the center rest clamping action needs to be performed separately, and after machining, the center rest releasing action needs to be performed separately. Although the time taken for each action is extremely short, in large-scale continuous production operations, the time of these additional actions will continue to accumulate, becoming a bottleneck restricting the improvement of production efficiency. At the same time, the independently driven center rest needs to be equipped with separate power pipelines, control components, and electrical modules, which not only significantly increases the manufacturing cost of the equipment but also increases the difficulty of daily maintenance. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide an internal hole surface grinding device with a chuck clamping mechanism.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An internal hole surface grinding apparatus with a chuck clamping mechanism includes, frame; The slide module and tool post module are mounted on the rack; The spindle module is mounted on the slide module and used to clamp and fix the workpiece. The spindle module is coaxially arranged with the tool post module. A clamping and guiding module is disposed on the tool holder module, the clamping and guiding module comprising: The follower guide assembly is used to clamp the workpiece as the spindle module feeds towards the tool holder module, and to provide circumferential limiting and guiding for the workpiece. A control component is provided for controlling the follow-up guide component to clamp the end of the workpiece as the spindle module feeds.

[0006] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, the slide module includes a slide rail seat fixedly mounted on the frame, an electric slide table slidably mounted on the slide rail seat, the electric slide table being used to drive the spindle module to feed the workpiece along the grinding direction, the spindle module including a spindle rotatably mounted on the electric slide table and a chuck fixedly mounted on the end of the spindle, the chuck being used to clamp the workpiece.

[0007] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, the tool holder module includes a gantry frame fixedly installed on the machine body, two support shafts symmetrical to each other along the chuck axis are fixedly installed on the gantry frame, a tool holder is provided between the two support shafts, and a grinding head is fixedly installed on the tool holder.

[0008] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, the following guide assembly includes a U-shaped frame fixedly installed on the gantry, the number of the U-shaped frames is two, and the two U-shaped frames are symmetrically distributed along the chuck axis, a plurality of guide rods are slidably passed through the U-shaped frame, and a mounting bracket is fixedly installed on one end of the plurality of guide rods near the chuck.

[0009] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, wherein: a plurality of return springs are fixedly installed on the mounting frame, and a clamping plate is installed at the ends of the plurality of return springs. The clamping plate is arc-shaped, and a plurality of balls are rotatably installed on the inner arc surface of the clamping plate.

[0010] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, wherein: a plurality of limiting rods that slide through the mounting frame are fixedly installed on the side of the clamping plate near the mounting frame, the reset spring is sleeved on the outside of the corresponding limiting rod, and a limiting plate is installed at the ends of the plurality of limiting rods.

[0011] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, a reset plate is jointly installed on the end of several guide rods away from the mounting frame, and several strong springs are jointly installed between the reset plate and the U-shaped frame, with the strong springs sleeved on the outside of the corresponding guide rods.

[0012] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, the slide rail base includes two slide rails that are symmetrical to each other along the chuck axis, and the slide table module further includes two sliders that are slidably mounted on the slide rail base, and the two sliders are slidably mounted on the two slide rails respectively.

[0013] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, the control component includes an L-shaped frame fixedly mounted on the slider, a wedge rod fixedly mounted on the L-shaped frame, and a wedge block cooperating with the corresponding wedge rod fixedly mounted on the limiting plate.

[0014] As a preferred embodiment of the internal hole surface grinding device with chuck clamping mechanism of the present invention, wherein: a fixed ring is fixedly installed on the chuck by a plurality of mounting rods, a rotating ring is rotatably installed on the fixed ring, and the wedge rod is fixedly connected to the rotating ring.

[0015] The beneficial effects of the internal hole surface grinding apparatus with chuck clamping mechanism of the present invention are as follows: In this application, by setting up a clamping guide module, the clamping and releasing actions of the workpiece are fully integrated into the feeding and retraction process of the electric slide table, completely eliminating the separate center frame clamping and releasing process, realizing seamless connection between processing actions and auxiliary actions, significantly improving the efficiency of mass production. At the same time, there is no need to equip additional power pipelines, control components and electrical modules, which greatly reduces the manufacturing cost of the equipment and the difficulty of daily maintenance. Moreover, the timing of the clamping action is mechanically determined by the position of the slide table, fundamentally eliminating safety accidents caused by mis-clamping or mis-releasing due to timing deviations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the slide module, tool holder module, and spindle module of the present invention.

[0019] Figure 3 For the present invention Figure 2 A magnified view of part A in the middle.

[0020] Figure 4 This is a three-dimensional structural diagram of the clamping and guiding module of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the rotating ring, L-shaped frame, and wedge-shaped rod of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the guide rod, mounting bracket, and reset spring of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the clamping plate and limiting rod of the present invention.

[0024] In the diagram: 1. Frame; 2. Slide module; 21. Slide rail seat; 22. Electric slide; 23. Slider; 3. Tool holder module; 31. Gantry frame; 32. Support shaft; 33. Tool holder; 4. Spindle module; 41. Spindle; 42. Chuck; 5. Clamping guide module; 51. Follow-up guide assembly; 511. U-shaped frame; 512. Guide rod; 513. Mounting bracket; 514. Return spring; 515. Clamping plate; 516. Limit rod; 517. Limit plate; 518. Strong spring; 519. Return plate; 510. Ball bearing; 52. Control assembly; 521. Rotating ring; 522. L-shaped frame; 523. Wedge rod; 524. Wedge block; 525. Mounting rod; 526. Fixing ring; 6. Workpiece; 7. Grinding head. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Reference Figures 1-7 This embodiment provides an internal hole surface grinding device with a chuck clamping mechanism, which includes: a frame 1; a slide module 2 and a tool post module 3 disposed on the frame 1; a spindle module 4 disposed on the slide module 2 and used to clamp and fix a workpiece 6, the spindle module 4 and the tool post module 3 being coaxially disposed; and a clamping guide module 5 disposed on the tool post module 3, the clamping guide module 5 including a follower guide component 51, the follower guide component 51 being used to clamp the workpiece 6 as the spindle module 4 feeds towards the tool post module 3, and a circumferential limiting guide control component 52 for the workpiece 6, the control component 52 being used to control the follower guide component 51 to clamp the end of the workpiece 6 as the spindle module 4 feeds.

[0027] It should be noted that the clamping and guiding module 5 is fully integrated into the tool holder module 3, and all its clamping and releasing actions are triggered and driven purely mechanically by the axial feed motion of the slide module 2 itself through the control component 52. There are no longer independent center rest clamping and releasing processes in the entire machining cycle. The entire process of the slide module 2 moving from the starting position to the machining endpoint and back automatically completes the clamping, follow-up support, and final release of the workpiece 6, achieving seamless connection between machining actions and auxiliary actions. This not only fundamentally eliminates the production efficiency bottleneck caused by the accumulation of auxiliary actions, but also significantly reduces the equipment's manufacturing cost, electrical complexity, and daily maintenance difficulty.

[0028] Reference Figures 1-7 The slide module 2 includes a slide rail seat 21 fixedly mounted on the frame 1, and an electric slide 22 slidably mounted on the slide rail seat 21. The electric slide 22 is used to drive the spindle module 4 to feed the workpiece 6 along the grinding direction. The spindle module 4 includes a spindle 41 rotatably mounted on the electric slide 22 and a chuck 42 fixedly mounted on the end of the spindle 41. The chuck 42 is used to clamp the workpiece 6.

[0029] Reference Figures 1-7 The tool holder module 3 includes a gantry 31 fixedly installed on the machine body. Two support shafts 32 symmetrically arranged along the axial direction of the chuck 42 are fixedly installed on the gantry 31. A tool holder 33 is arranged between the two support shafts 32. A grinding head 7 is fixedly installed on the tool holder 33.

[0030] It should be noted that the clamping and guiding module 5 is installed on both sides of the grinding head 7 and is completely offset from the head in space. It will not interfere with the grinding head 7 during the feeding process with the spindle module 4, ensuring that the head can smoothly extend into the bottom of the inner hole of the workpiece 6 to complete the full stroke grinding process.

[0031] Reference Figures 1-7 The follow-up guide assembly 51 includes a U-shaped frame 511 fixedly installed on the gantry 31. There are two U-shaped frames 511, and the two U-shaped frames 511 are symmetrically distributed along the axial direction of the chuck 42. Several guide rods 512 slide through the U-shaped frame 511, and a mounting bracket 513 is fixedly installed on one end of the several guide rods 512 near the chuck 42.

[0032] Reference Figures 1-7 A plurality of return springs 514 are fixedly installed on the mounting bracket 513. The ends of the plurality of return springs 514 are jointly installed with a clamping plate 515. The clamping plate 515 is arc-shaped, and a plurality of ball bearings 510 are rotatably installed on the inner arc surface of the clamping plate 515.

[0033] Reference Figures 1-7 The clamping plate 515 is fixedly installed with a plurality of limiting rods 516 that slide through the mounting frame 513 on the side near the mounting frame 513. The reset spring 514 is sleeved on the outside of the corresponding limiting rod 516. The ends of the plurality of limiting rods 516 are jointly installed with a limiting plate 517.

[0034] Reference Figures 1-7 A reset plate 519 is installed on one end of several guide rods 512 away from the mounting frame 513. Several strong springs 518 are installed between the reset plate 519 and the U-shaped frame 511. The strong springs 518 are sleeved on the outside of the corresponding guide rods 512.

[0035] It should be noted that the function of the return spring 514 is to push the clamping plate 515 to automatically reset and release the workpiece 6 when the workpiece 6 is finished. The ball bearings 510 on the inner arc surface of the clamping plate 515 will change the sliding friction into rolling friction, which greatly reduces the friction force. Not only will it not leave scratches and indentations on the outer surface of the workpiece 6, it can also effectively reduce the heat and noise generated by friction.

[0036] The sliding fit between the guide rod 512 and the U-shaped frame 511 ensures that the mounting frame 513 and the clamping plate 515 move smoothly in the radial direction, preventing the clamping plate 515 from deflecting during clamping and ensuring that the clamping force is evenly distributed on the outer surface of the workpiece 6. The function of the strong spring 518 is to push the entire follow-up guide assembly 51 to automatically reset to the initial position when the machining is completed and the electric slide table 22 retracts, so as to prepare for the clamping and machining of the next workpiece 6 without manual intervention.

[0037] Reference Figures 1-7 The slide rail base 21 includes two slide rails that are symmetrical to each other along the axial direction of the chuck 42. The slide table module 2 also includes two sliders 23 that are slidably mounted on the slide rail base 21. The two sliders 23 are slidably mounted on the two slide rails respectively.

[0038] Reference Figures 1-7 The control component 52 includes an L-shaped frame 522 fixedly mounted on the slider 23, a wedge rod 523 fixedly mounted on the L-shaped frame 522, and a wedge block 524 that cooperates with the corresponding wedge rod 523 fixedly mounted on the limiting plate 517.

[0039] Reference Figures 1-7 A fixed ring 526 is fixedly installed on the chuck 42 by a plurality of mounting rods 525, and a rotating ring 521 is rotatably installed on the fixed ring 526. The wedge rod 523 is fixedly connected to the rotating ring 521.

[0040] It should be noted that the inclined plane transmission of the wedge rod 523 and the wedge block 524 can convert the axial force generated by the feed of the electric slide table 22 into radial thrust, ensuring that the clamping plate 515 can firmly clamp the end of the workpiece 6. Since the wedge rod 523 is directly fixed on the slider 23 of the electric slide table 22, its movement is completely synchronized with the feed movement of the electric slide table 22. Therefore, the timing of the clamping action is completely determined by the position of the electric slide table 22, and there is no timing deviation, which fundamentally eliminates the possibility of accidental clamping and accidental release.

[0041] The rotational motion between the rotating ring 521 and the fixed ring 526 solves the motion interference problem between the rotating workpiece 6 and the non-rotating control component 52. When the chuck 42 and the workpiece 6 rotate at high speed, the fixed ring 526 rotates with the chuck 42, while the rotating ring 521 and the wedge rod 523 remain stationary and only move axially linearly with the electric slide table 22. This ensures that the control component 52 can stably and reliably drive the follow-up guide component 51 to complete the clamping and releasing actions.

[0042] During use, the operator first clamps one end of the piston rod to be processed in the chuck 42 and secures it, completing the initial positioning and fixing of the workpiece 6. Then, the spindle 41 is driven by an external power source to start running and drive the chuck 42 and piston rod to rotate at high speed. At the same time, the electric slide table 22 is smoothly fed along the slide rail seat 21 towards the tool holder module 3.

[0043] While the electric slide table 22 moves, the mounting rod 525 simultaneously pushes the fixed ring 526 and the rotating ring 521 to move, thereby causing the wedge rod 523 to gradually approach the wedge block 524. When the inclined surface of the wedge rod 523 begins to contact the inclined surface of the wedge block 524, as the electric slide table 22 continues to feed, the inclined surface of the wedge rod 523 continuously squeezes the inclined surface of the wedge block 524, pushing the wedge block 524 to move towards the axis of the workpiece 6. The wedge block 524 drives the limiting rod 516 to move inward synchronously through the limiting plate 517. The limiting rod 516 then pushes the clamping plate 515 closer to the workpiece 6, while stretching the return spring 514, until the ball bearings 510 on the inner arc surface of the clamping plate 515 are tightly attached to the outer circular surface of the end of the workpiece 6, completing the automatic clamping of the end of the workpiece 6.

[0044] Next, the electric slide 22 continues to feed towards the tool holder module 3. During this process, since the clamping plate 515 has already clamped the workpiece 6, when the wedge rod 523 continues to squeeze the wedge block 524, the wedge block 524 will not continue to move. Therefore, the wedge rod 523 will push the wedge block 524, thereby driving the mounting bracket 513 to move closer to the tool head and stretch the strong spring 518. During this stage, the clamping plate 515 always maintains a stable clamping state on the end of the workpiece 6 and moves synchronously towards the tool head with the workpiece 6, achieving the effect of follow-up support.

[0045] At the same time, the grinding head 7 gradually extends into the axial mounting hole of the workpiece 6 to perform grinding on the inner hole surface. Throughout the grinding process, the wedge rod 523 always maintains a squeezing state on the wedge block 524, so that the clamping plate 515 continuously and stably clamps the end of the workpiece 6, providing reliable radial support for the high-speed rotating workpiece 6, effectively suppressing the radial runout, vibration and elastic bending deformation generated during the processing, and ensuring the machining accuracy and surface quality of the inner hole.

[0046] When the grinding head 7 reaches the bottom of the axial mounting hole of the workpiece 6 and completes the full-stroke grinding process, the electric slide 22 drives the spindle module 4 to start retracting in the reverse direction. As the electric slide 22 moves backward, the wedge rod 523 gradually separates from the wedge block 524, and the radial thrust acting on the wedge block 524 disappears. At this time, the compressed return spring 514 releases its elastic force, pushing the clamping plate 515 to move outward and automatically releasing the end of the workpiece 6. At the same time, the compressed strong spring 518 gradually releases its elastic force, pushing the entire follower guide assembly 51 to move through the return plate 519 and the guide rod 512, resetting to the initial state.

[0047] Once the electric slide 22 has fully retracted to the starting position, the spindle 41 stops rotating, and the operator can remove the finished workpiece 6, thus completing one complete machining cycle. By repeating the above steps, continuous mass grinding of the piston rod axial mounting hole can be achieved.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A grinding device for internal hole surfaces with a chuck clamping mechanism, characterized in that: include, Rack (1); The slide module (2) and the tool holder module (3) are mounted on the rack (1). The spindle module (4) is set on the slide module (2) and used to clamp and fix the workpiece (6). The spindle module (4) is coaxially set with the tool holder module (3). A clamping guide module (5) is disposed on the tool holder module (3), the clamping guide module (5) comprising, Follow-up guide assembly (51) is used to clamp the workpiece (6) as the spindle module (4) feeds towards the tool holder module (3), and to perform circumferential limiting and guiding of the workpiece (6). Control component (52) is used to control the follower guide component (51) to clamp the end of the workpiece (6) as the spindle module (4) feeds.

2. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 1, characterized in that: The slide module (2) includes a slide rail seat (21) fixedly mounted on the frame (1), and an electric slide (22) is slidably mounted on the slide rail seat (21). The electric slide (22) is used to drive the spindle module (4) to feed the workpiece (6) along the grinding direction. The spindle module (4) includes a spindle (41) rotatably mounted on the electric slide (22) and a chuck (42) fixedly mounted on the end of the spindle (41). The chuck (42) is used to clamp the workpiece (6).

3. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 2, characterized in that: The tool holder module (3) includes a gantry (31) fixedly installed on the machine body. Two support shafts (32) symmetrical to each other along the chuck (42) axis are fixedly installed on the gantry (31). A tool holder (33) is provided between the two support shafts (32). A grinding head (7) is fixedly installed on the tool holder (33).

4. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 3, characterized in that: The follow-up guide assembly (51) includes a U-shaped frame (511) fixedly installed on the gantry (31). There are two U-shaped frames (511), and the two U-shaped frames (511) are symmetrically distributed along the chuck (42) axis. Several guide rods (512) slide through the U-shaped frame (511), and a mounting bracket (513) is fixedly installed on one end of the guide rods (512) near the chuck (42).

5. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 4, characterized in that: A number of return springs (514) are fixedly installed on the mounting bracket (513). The ends of the return springs (514) are jointly installed with a clamping plate (515). The clamping plate (515) is arc-shaped, and a number of ball bearings (510) are rotatably installed on the inner arc surface of the clamping plate (515).

6. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 5, characterized in that: The clamping plate (515) is fixedly installed with a number of limiting rods (516) that slide through the mounting frame (513) on the side near the mounting frame (513). The reset spring (514) is sleeved on the outside of the corresponding limiting rod (516). The ends of the multiple limiting rods (516) are jointly installed with a limiting plate (517).

7. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 6, characterized in that: A reset plate (519) is installed on one end of several guide rods (512) away from the mounting frame (513). Several strong springs (518) are installed between the reset plate (519) and the U-shaped frame (511). The strong springs (518) are sleeved on the outside of the corresponding guide rods (512).

8. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 7, characterized in that: The slide rail base (21) includes two slide rails that are symmetrical to each other along the axial direction of the chuck (42). The slide module (2) also includes two sliders (23) that are slidably mounted on the slide rail base (21). The two sliders (23) are slidably mounted on the two slide rails respectively.

9. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 8, characterized in that: The control component (52) includes an L-shaped frame (522) fixedly mounted on the slider (23), a wedge rod (523) fixedly mounted on the L-shaped frame (522), and a wedge block (524) that cooperates with the corresponding wedge rod (523) fixedly mounted on the limiting plate (517).

10. The internal hole surface grinding device with a chuck clamping mechanism as described in claim 9, characterized in that: A fixed ring (526) is fixedly installed on the chuck (42) by a number of mounting rods (525), and a rotating ring (521) is rotatably installed on the fixed ring (526). The wedge rod (523) is fixedly connected to the rotating ring (521).

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