Device for assisting fine adjustment of tool fixture in turning-milling composite machining center

Abstract

The present invention relates to the technical field of turning and milling tools, specifically, to a device for assisting in the fine adjustment of tool fixtures in a turning and milling composite machining center, comprising a milling cutter and a clamping assembly, wherein a fine adjustment assembly is provided in the clamping assembly, wherein the clamping assembly comprises an outer cylinder, a tapered sleeve, a movable cylinder and a spiral sleeve; the fine adjustment assembly is composed of an observation structure and an adjustment structure; the observation structure comprises a fixed cylinder, a contact rod and a push rod, and the adjustment structure comprises an adjustment rod, a fixed rod and a movable rod. This device, by providing an observation structure, when the milling cutter deviates, pushes up the contact rod to drive the push rod to rotate, thereby driving the piston to move and amplify the deviation of the milling cutter, making it convenient for subsequent users to observe and adjust, and at the same time, the spring gives the spiral sleeve an upward unilateral thrust to prevent the milling cutter from becoming loose; by providing an adjustment structure, when adjusting, the adjustment rod slides to the right, causing the second block to abut against the first block and give the first block a downward thrust, thereby driving the abutment ring to push the milling cutter downward to reset.

Description

Technical Field

[0001] The invention belongs to the technical field of turning and milling tools, in particular to a device for assisting the fine adjustment of a tool fixture of a turning and milling composite machining center. Background Art

[0002] A turning-milling machining center is a high-end CNC machine tool that integrates multiple machining functions such as turning, milling, drilling, and boring. An auxiliary turning-milling machining center refers to a machine tool that, on the basis of the above functions, also has auxiliary functions such as auxiliary clamping and tool management. The tool fixture fine-tuning device is the core device, which ensures machining accuracy by slightly adjusting the position and angle of the tool or fixture.

[0003] For example, the invention patent application with publication number CN119216647A in the field of lathe tool technology discloses a bidirectional fine-adjustable precision milling cutter bar, including a cutter bar body, an inner groove with the outer edge of the cutter bar body recessed toward the axis of the cutter bar body, the inner groove is provided with a blade module, the blade module includes a blade block movably mounted in the inner groove; the inner groove is provided with a radial drive member and an axial drive member; when the position and angle of the blade block need to be fine-tuned, by rotating the first fine-tuning screw or the second fine-tuning screw, the first fine-tuning screw will drive the radial movable block to move radially when it moves, and since the radial movable block is elastically connected to the blade block, the radial position of the blade block can be adjusted by moving the first fine-tuning screw; the axial position of the blade block can be adjusted by moving the second fine-tuning screw.

[0004] Combining the above cases with actual conditions, we found the following problem: During milling, the tool needs to move on the Z axis to meet the milling depth. The tool and the workpiece are inevitably squeezed, causing the tool to have a slight offset on the Z axis, which affects subsequent milling. The user needs to adjust the tool position, but because the offset is usually small after the tool is clamped, the user's direct judgment of the offset size through experience and vision is low in accuracy, and it is more troublesome to detect it through complex instruments. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for assisting in the fine adjustment of the tool fixture of a turning-milling composite machining center. By setting an observation structure, the slight offset of the milling cutter is converted into the movement of the piston to amplify the offset of the milling cutter, and the adjustment structure is used to drive the milling cutter to reset, so as to solve the problem of low accuracy of users in judging the size of the offset in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a device for assisting the fine adjustment of a tool fixture in a turning-milling composite machining center, comprising a milling cutter and a clamping assembly for fixing the milling cutter, wherein a fine adjustment assembly for fine-tuning the milling cutter on the Z axis is provided in the clamping assembly, wherein the clamping assembly comprises an outer cylinder, a tapered sleeve, a movable cylinder, and a spiral sleeve arranged in sequence from bottom to top in the outer cylinder, wherein the inner wall of the spiral sleeve is threadedly connected to the outer wall of the movable cylinder, and the tapered sleeve is clamped to the movable cylinder;

[0007] The fine-tuning assembly consists of an observation structure for observing the offset of the milling cutter and an adjustment structure for fine-tuning the offset of the milling cutter;

[0008] The observation structure includes a fixed cylinder, a contact rod slidably connected to the middle part of the bottom surface of the fixed cylinder, and a push rod transmission-connected to the top end of the contact rod, the top surface of the fixed cylinder is fixedly connected to the inner top surface of the spiral sleeve, a piston cylinder is provided near the top of the central axis of the fixed cylinder, a piston is provided in the piston cylinder, the bottom of the piston passes through the bottom surface of the piston cylinder and abuts against the outer surface of the push rod, and a spring is provided between the piston and the inner top surface of the piston cylinder;

[0009] The adjustment structure includes a horizontally arranged adjustment rod, two fixed rods symmetrically fixed on the outer bottom surface of the fixed cylinder in the front and rear, and a movable rod slidably connected under the fixed rod. The two movable rods are fixedly connected to the same abutment ring, and the abutment ring abuts against the top surface of the milling cutter. A second abutment block is integrally formed at the outer end of the adjustment rod, and a first abutment block adapted to the second abutment block is provided in the movable rod.

[0010] In the above setting, when turning and milling some precision components, it is necessary to ensure the feed depth of the milling cutter. However, the milling cutter will inevitably deviate after long-term use. The Z-axis offset has a greater impact on the turning and milling feed depth of the milling cutter. However, after the milling cutter is clamped and fixed, the Z-axis offset is small. Users can usually only adjust it through experience, resulting in low adjustment accuracy; therefore, the top contact rod of the milling cutter is used to drive the top rod to rotate, and then the piston is driven to move to amplify the offset of the milling cutter, which is convenient for subsequent users to observe and adjust. At the same time, the compressed spring gives the spiral sleeve an upward unilateral thrust to avoid the situation where the thread rotates between the spiral sleeve and the movable cylinder, which causes the fixation of the milling cutter to become loose. After that, the adjusting rod is slid to the right, so that the second block is pressed against the first block and gives the first block a downward thrust, thereby driving the abutment ring to push the milling cutter downward to reset.

[0011] In the technical solution of the present invention, the cone sleeve is in a cone shape with a large diameter at the lower part and a small diameter at the upper part. The lower half of the inner wall of the outer cylinder is in a cone shape that matches the shape of the cone sleeve, and the upper half of the inner wall is in a cylindrical shape that matches the diameter of the spiral sleeve.

[0012] In this arrangement, by providing a tapered sleeve, when fixed, the tapered sleeve moves upward relative to the outer cylinder so that the tapered sleeve is compressed toward the middle, thereby clamping the milling cutter.

[0013] In the technical solution of the present invention, an observation window is provided in the middle of the front side of the outer cylinder wall, an observation groove is provided on the spiral sleeve, the fixed cylinder wall and the piston cylinder wall are both provided with openings corresponding to the position of the observation groove, and scales are provided on both sides of the opening on the piston cylinder. The size of the observation window, the size of the observation groove, the size of the opening on the fixed cylinder, and the size of the opening on the piston cylinder decrease in sequence.

[0014] In this setting, by providing an observation window and scale, the user can see the piston and the scale on the piston cylinder through the observation window during fine-tuning, which is convenient for observation.

[0015] In the technical solution of the present invention, the spiral sleeve is clamped on the top of the outer cylinder and the two are rotatably connected. The spiral sleeve passes through the top surface of the outer cylinder. A clamping ring is fixed to the bottom end of the movable cylinder. A clamping groove that matches the size and position of the clamping ring is provided on the inner wall of the cone sleeve near the top, and a number of regularly distributed spacing grooves are provided on the cone sleeve.

[0016] In this setting, by providing a clamping groove and a clamping ring, when the movable cylinder moves upward, it can pull the tapered sleeve upward synchronously to clamp the milling cutter so that the tapered sleeve as a whole has space to shrink, avoiding the inability to shrink and fix the milling cutter.

[0017] In the technical solution of the present invention, the bottom end of the milling cutter abuts against the top surface of the milling cutter, a hinged seat is fixed to the top surface of the contact rod, a pry bar is hinged to the left side of the hinged seat, the rotating shaft of the pry bar is located on the side close to the hinged seat, a pull rod is hinged above the left end of the pry bar, a horizontal extension part is fixed to the left end of the top rod, and the left end of the extension part is hinged to the top end of the pull rod.

[0018] In this setting, by setting a pry bar, when the Z-axis offset occurs during use of the milling cutter, the articulated seat pushes up the right end of the pry bar, causing the left end of the pry bar to drive the pull rod downward. Since the right side of the pry bar's rotating shaft is shorter than the left side, when the right end of the pry bar is pushed up, the distance the left end of the pry bar descends is greater than the distance the right end of the pry bar is pushed up, and the distance the right end of the pry bar is pushed up is equal to the offset of the milling cutter on the Z-axis, thereby amplifying the offset of the milling cutter and making it easier for subsequent users to fine-tune the amount of milling cutter adjustment.

[0019] In the technical solution of the present invention, a shaft rod is fixed symmetrically at the front and rear ends of the right end of the push rod, and the shaft rod is rotatably connected to the inner wall of the fixed cylinder. The shaft rod is located on the left side of the central axis of the fixed cylinder. The push rod is spiral-shaped from the left end to the right end, and the radius of the left end is small and the radius of the right end is large. The bottom end of the piston passes through the piston cylinder and the end face abuts against the middle part of the outer surface of the push rod.

[0020] In this setting, by setting a shaft rod, the pull rod pulls the push rod through the extension part to rotate counterclockwise around the left end. As the push rod rotates around the left end, the push rod lifts the piston to a greater extent, and the piston sliding amplitude is increased, which is convenient for subsequent observation.

[0021] In the technical solution of the present invention, the left end of the adjusting rod is horizontally concave, the second stop block is fixed to the left end of the bottom surface of the protruding part of the left end of the adjusting rod, and a threaded rod is fixed in the middle of the front and rear horizontal sections of the right end of the adjusting rod. The right end of the threaded rod passes through the spacing groove and the outer cylinder wall from the inside to the outside in sequence, and the threaded rod is threadedly connected to the outer cylinder wall.

[0022] In this setting, by setting the threaded rod, when the milling cutter is observed to be offset in the Z axis, the threaded rod is rotated to drive the adjustment rod to move to the right and drive the second block to move to the right.

[0023] In the technical solution of the present invention, a limiting block is fixed at the top of the movable rod, and the limiting block is slidably connected in the corresponding fixed rod. A vertical movable groove is provided in the movable rod, and the first stop block is fixed on the inner bottom surface of the corresponding movable groove.

[0024] In this setting, a limit block is set to limit the upward and downward sliding of the movable rod to prevent the movable rod from rotating and affecting the sliding of the adjustment rod.

[0025] In the technical solution of the present invention, the protruding part of the left end of the adjusting rod passes through the movable groove on the corresponding side, the outer surfaces of the second stop block and the first stop block are both arc-shaped, and the arc surface of the second stop block is set downward and the arc surface of the first stop block is set upward, and the bottom end height of the second stop block is lower than the top end height of the first stop block.

[0026] In this setting, a movable groove is provided to prevent the movable rod from blocking the adjustment rod from sliding left and right. The bottom end height of the second block is lower than the top end height of the first block, ensuring that the second block contacts the first block and presses down the first block when moving to the right.

[0027] In the technical solution of the present invention, a limit rod is provided on the left side of the adjusting rod, the left end of the limit rod passes through the spacing groove and is fixed to the inner wall of the outer cylinder, the right end of the limit rod is concave and adapted to the left end of the adjusting rod, and the front and rear protruding parts are slidably connected with the corresponding protruding parts of the adjusting rod.

[0028] In this arrangement, the regulating rod is supported by providing a limit rod to prevent the left end from being damaged by force when the regulating rod drives the second stop block to contact the first stop block.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] 1. In the present invention, by setting an observation structure, when the milling cutter deviates from the Z axis, the milling cutter slides up a small distance and pushes the contact rod to drive the hinged seat to push up, and then drives the pull rod to press down through the pry rod. Under the action of the extension part, the push rod is pulled to rotate counterclockwise around the left end. As the push rod rotates, the greater the amplitude of the piston lifted by the push rod, the greater the sliding amplitude of the piston, which facilitates subsequent observation to achieve the amplification of the offset of the milling cutter. The user observes the corresponding scale of the piston through the observation window, which is convenient for the subsequent user to grasp the fine-tuning amount of the milling cutter.

[0031] 2. In the present invention, by setting a spring, when the piston is pushed up, the spring is compressed and gives the spiral sleeve an upward unilateral thrust, so that the threaded connection between the spiral sleeve and the movable cylinder is tighter, avoiding the situation where the thread rotates between the spiral sleeve and the movable cylinder and causes the fixation of the milling cutter to become loose.

[0032] 3. In the present invention, an adjustment structure is provided. When adjusting, the threaded rod is rotated to drive the adjustment rod to move to the right and drive the second block to move to the right, so that the second block presses against the first block to the right. Since the contact surfaces of the second block and the first block are both arc-shaped surfaces, the first block moves downward and presses against the milling cutter, so that the milling cutter is reset and the adjustment is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the interior of the outer cylinder of the present invention;

[0035] Figure 3 This is a schematic diagram of the interior of the spiral sleeve in the present invention;

[0036] Figure 4 An exploded view of the clamping assembly of the present invention;

[0037] Figure 5 is a cross-sectional view of the clamping assembly of the present invention;

[0038] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0039] Figure 7 Schematic diagram of the fine-tuning component in the present invention;

[0040] Figure 8 This is a schematic diagram of the interior of the fixed cylinder in the present invention;

[0041] Figure 9 This is an exploded view of the ejector pin in the present invention;

[0042] Figure 10 Schematic diagram of the regulating structure in the present invention;

[0043] Figure 11 It is a partial cross-sectional view of the adjustment structure in the present invention;

[0044] Figure 12 This is an exploded view of the adjustment rod in the present invention;

[0045] Description of reference numerals:

[0046] 100, clamping assembly; 101, outer cylinder; 101a, observation window; 102, cone sleeve; 102a, snap-fit ​​groove; 102b, spacing groove; 103, movable cylinder; 103a, snap ring; 104, spiral sleeve; 104a, observation groove;

[0047] 200, milling cutter;

[0048] 300, fine-tuning assembly; 310, observation structure; 311, fixed cylinder; 312, piston cylinder; 313, contact rod; 313a, hinged seat; 314, pry bar; 315, pull rod; 316, push rod; 316a, shaft rod; 316b, extension; 317, piston; 318, spring; 320, adjustment structure; 321, threaded rod; 322, adjustment rod; 323, limit rod; 324, movable rod; 324a, movable groove; 325, fixed rod; 326, first stop block; 327, limit block; 328, abutment ring; 329, second stop block. DETAILED DESCRIPTION

[0049] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0050] Unless expressly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0051] Reference Figures 1-12 As shown, this embodiment provides a technical solution:

[0052] The device for fine-tuning the tool fixture of the auxiliary turning and milling compound machining center in the present invention comprises a milling cutter 200 and a clamping assembly 100 for fixing the milling cutter 200. The clamping assembly 100 is provided with a fine-tuning assembly 300 for fine-tuning the milling cutter 200 in the Z axis. In the auxiliary turning and milling compound machining center, after the clamping assembly 100 is fixed to the driving device, the machining center uses a motor to fine-tune the clamping assembly 100 and the milling cutter 200 in the X-axis and Y-axis directions. This is the existing technology in the field and will not be described in detail here. The clamping assembly 100 includes The outer cylinder 101, the tapered sleeve 102, the movable cylinder 103 and the spiral sleeve 104 are sequentially arranged from bottom to top in the outer cylinder 101. The inner wall of the spiral sleeve 104 is threadedly connected to the outer wall of the movable cylinder 103. The tapered sleeve 102 is clamped with the movable cylinder 103. When fixing the milling cutter 200, the shank of the milling cutter 200 is inserted from bottom to top into the spiral sleeve 104. Then, the spiral sleeve 104 is rotated by a tool to drive the movable cylinder 103 to rise and pull the tapered sleeve 102 upward, so that the inner wall of the tapered sleeve 102 clamps the shank of the milling cutter 200.

[0053] The fine-tuning assembly 300 consists of an observation structure 310 and an adjustment structure 320 for fine-tuning the offset of the milling cutter 200. The observation structure 310 is used to observe the offset of the milling cutter 200 on the Z axis, which facilitates subsequent users to grasp the fine-tuning range of the milling cutter 200 and improve fine-tuning accuracy.

[0054] The observation structure 310 includes a fixed cylinder 311, a contact rod 313 slidably connected to the middle of the bottom surface of the fixed cylinder 311, and a push rod 316 that is transmission-connected to the top of the contact rod 313. The top surface of the fixed cylinder 311 is fixedly connected to the inner top surface of the spiral sleeve 104 by bolts. A piston cylinder 312 is provided near the top of the central axis of the fixed cylinder 311. A piston 317 is provided in the piston cylinder 312. The piston 317 passes through the bottom surface of the piston cylinder 312 and abuts against the outer surface of the push rod 316. A spring 318 is provided between the piston 317 and the inner top surface of the piston cylinder 312. When the milling cutter 200 has a slight offset in the Z axis after turning and milling, the milling cutter 200 will push the top of the piston cylinder 312. The upper contact rod 313 drives the push rod 316 to rotate and push the piston 317. The displacement of the milling cutter 200 is converted into the upward movement distance of the piston 317 through the transmission of the push rod 316, so that the small displacement distance of the milling cutter 200 is magnified, which is convenient for the user to fine-tune the Z axis of the milling cutter 200. At the same time, the upper piston 317 compresses the upper spring 318, and the spring 318 gives the spiral sleeve 104 an upward thrust, making the threaded connection between the spiral sleeve 104 and the movable cylinder 103 tighter, avoiding the situation where the screws between the spiral sleeve 104 and the movable cylinder 103 rotate and the fixation of the milling cutter 200 becomes loose;

[0055] The adjustment structure 320 includes a horizontally arranged adjustment rod 322, two fixed rods 325 symmetrically welded and fixed to the outer bottom surface of the fixed cylinder 311, and a movable rod 324 slidably connected to the bottom of the fixed rod 325. The two movable rods 324 are welded and fixedly connected with the same abutment ring 328, and the abutment ring 328 abuts against the top surface of the milling cutter 200. A second abutment 329 is integrally formed at the outer end of the adjustment rod 322, and a first abutment 326 adapted to the second abutment 329 is provided in the movable rod 324. When fine-tuning the milling cutter 200, the adjustment rod 322 is slid horizontally from the right, so that the second abutment 329 abuts against the first abutment 326 and gives the first abutment 326 a downward thrust, so that the movable rod 324 drives the abutment ring 328 to push the milling cutter 200 downward, thereby driving the milling cutter 200 to deflect slightly downward to achieve recovery.

[0056] See also Figure 1-Figure 5As shown, the tapered sleeve 102 is in the shape of a cone with a large diameter at the bottom and a small diameter at the top. The lower half of the inner wall of the outer cylinder 101 is in the shape of a cone that matches the shape of the tapered sleeve 102, and the upper half of the inner wall is in the shape of a cylinder that matches the diameter of the spiral sleeve 104. When the spiral sleeve 104 drives the movable cylinder 103 to rise and pulls the tapered sleeve 102 upward, the outer cylinder 101 is fixed, and the tapered sleeve 102 moves upward relative to the outer cylinder 101, so that the tapered sleeve 102 is compressed toward the middle, thereby clamping the shank of the milling cutter 200 and fixing the milling cutter 200. Anti-slip grooves can be provided on the inner wall of the tapered sleeve 102 and the outer wall of the shank of the milling cutter 200. This is a common means to increase friction and enhance the fixing effect, which will not be elaborated here.

[0057] In addition, an observation window 101a is provided in the middle of the front side of the outer cylinder 101 wall, an observation groove 104a is provided on the spiral sleeve 104, and the walls of the fixed cylinder 311 and the piston cylinder 312 are both provided with openings corresponding to the position of the observation groove 104a. After the milling cutter 200 deviates from the Z axis, the user can see the position of the piston 317 through the observation window 101a and the two openings. It should be noted that the outer edge of the piston 317 can be dyed in a conspicuous color such as red to facilitate observation by the user. Scales are provided on both sides of the opening on the piston cylinder 312. By observing The scale corresponding to the piston 317 after the offset is compared with the scale corresponding to the piston 317 before the offset. When the user is fine-tuning, he only needs to ensure that the piston 317 falls back to the original scale to ensure that the fine-tuning is completed, which is convenient for the user to perform fine-tuning operations. The size of the observation window 101a, the size of the observation groove 104a, the size of the opening on the fixed cylinder 311, and the size of the opening on the piston cylinder 312 are reduced in sequence to ensure that the user can see the piston 317 and the scale on the piston cylinder 312 through the observation window 101a. In addition, the thickness at the edge of the piston 317 is relatively small to ensure that the piston 317 can clearly correspond to the scale.

[0058] See also Figure 6 As shown, the spiral sleeve 104 is clamped on the top of the outer cylinder 101 and the two are rotatably connected. The spiral sleeve 104 passes through the top surface of the outer cylinder 101. A clamping ring 103a is fixed to the bottom end of the movable cylinder 103. A clamping groove 102a that matches the size and position of the clamping ring 103a is provided on the inner wall of the tapered sleeve 102 near the top. Through the cooperation of the clamping groove 102a and the clamping ring 103a, when the movable cylinder 103 moves upward, the tapered sleeve 102 can be pulled up synchronously to clamp the handle of the milling cutter 200. It is noted that a gap is left between the clamping groove 102a and the clamping ring 103a for the tapered sleeve 102 to shrink, so as to prevent the tapered sleeve 102 from being blocked by the clamping ring 103a when being pulled upward and shrinking toward the middle, thereby causing the inability to tighten and clamp the shank of the milling cutter 200. A number of regularly distributed spacing grooves 102b are provided on the tapered sleeve 102. By providing the spacing grooves 102b, the tapered sleeve 102 as a whole has space to shrink, so as to prevent it from being unable to shrink and unable to fix the milling cutter 200.

[0059] See also Figure 7-Figure 9 As shown, the bottom end of the contact rod 313 abuts against the top surface of the milling cutter 200. When the milling cutter 200 is fixed, the milling cutter 200 is pushed until it contacts the bottom end of the contact rod 313. A hinge seat 313a is fixed to the top surface of the contact rod 313. A pry bar 314 is hinged to the left side of the hinge seat 313a. The rotating shaft of the pry bar 314 is located on the side close to the hinge seat 313a. It should be noted that the right end of the pry bar 314 is slidably connected to the hinge end of the hinge seat 313a to ensure that the pry bar 314 can rotate. A pull rod 315 is hinged above the left end of the pry bar 314, and a horizontal extension portion 316b is fixed to the left end of the top rod 316. The left end of the extension portion 316b is hinged to the top of the pull rod 315. When the milling cutter 200 is offset in the Z axis during use, the hinged seat 313a pushes up the right end of the pry bar 314, causing the left end of the pry bar 314 to drive the pull rod 315 downward. Since the right side of the rotating shaft of the pry bar 314 is shorter than the left side, when the right end of the pry bar 314 is pushed up, the distance the left end of the pry bar 314 descends is greater than the distance the right end of the pry bar 314 is pushed up, and the distance the right end of the pry bar 314 is pushed up is equal to the offset of the milling cutter 200 in the Z axis, thereby amplifying the offset of the milling cutter 200 and making it easier for subsequent users to fine-tune the amount of milling cutter 200.

[0060] When the cam 316 is in the unlock state, the cam 316 is in the unlock state, and the cam 316 is in the unlock state, so the cam 316 is locked.

[0061] See also Figure 10-12The second stop 329 is fixed to the bottom surface of the protruding part of the left end of the adjusting rod 322, and a threaded rod 321 is fixed in the middle of the front and rear horizontal sections of the right end of the adjusting rod 322. The right end of the threaded rod 321 passes through the spacing groove 102b and the wall of the outer cylinder 101 from the inside to the outside. The pitch of the threaded rod 321 is small, ensuring that the threaded rod 321 rotates one circle and the distance the adjusting rod 322 moves to the right is small, avoiding excessive movement, which makes it difficult to precisely adjust the milling cutter 200. The threaded rod 321 is threadedly connected to the wall of the outer cylinder 101. When it is observed that the milling cutter 200 is offset in the Z axis, the threaded rod 321 is rotated to drive the adjusting rod 322 to move to the right and drive the second stop 329 to move to the right.

[0062] Furthermore, a limit block 327 is fixed at the top of the movable rod 324, and the limit block 327 is slidably connected to the corresponding fixed rod 325. The limit block 327 limits the movable rod 324 from sliding up and down to prevent the movable rod 324 from rotating and affecting the sliding of the adjustment rod 322. A vertical movable groove 324a is provided in the movable rod 324, and the first stop block 326 is fixed to the inner bottom surface of the corresponding movable groove 324a. The protruding part of the left end of the adjustment rod 322 passes through the corresponding side movable groove 324a. The advantage is that when the movable rod 324 moves up and down, the upper and lower spaces in the movable groove 324a are large enough to prevent the adjustment rod 322 from colliding with the movable groove 324a. The outer surfaces of the second block 329 and the first block 326 are both arc-shaped, and the arc surface of the second block 329 is set downward and the arc surface of the first block 326 is set upward. The bottom end of the second block 329 is lower than the top end of the first block 326, ensuring that the second block 329 contacts the first block 326 when moving to the right and presses the first block 326 downward.

[0063] In addition, a limiting rod 323 is provided on the left side of the adjusting rod 322. The left end of the limiting rod 323 passes through the spacing groove 102b and is fixed to the inner wall of the outer cylinder 101. The right end of the limiting rod 323 is concave and adapted to the left end of the adjusting rod 322, and the front and rear protruding parts are slidably connected with the corresponding protruding parts of the adjusting rod 322. By providing the limiting rod 323, the adjusting rod 322 is supported to avoid the left end being damaged by force when the adjusting rod 322 drives the second stop block 329 to abut against the first stop block 326.

[0064] The working principle of the device for assisting fine adjustment of tool fixtures in a turning-milling composite machining center of the present invention is as follows:

[0065] When clamping the milling cutter 200, the shank of the milling cutter 200 is inserted into the spiral sleeve 104 from bottom to top, and then the spiral sleeve 104 is rotated by the tool to drive the movable cylinder 103 to rise and pull the tapered sleeve 102 upward, so that the inner wall of the tapered sleeve 102 clamps the shank of the milling cutter 200;

[0066] When the Z-axis offset occurs during the operation of the milling cutter 200, the milling cutter 200 slides up a small distance and drives the hinge seat 313a to push up, which in turn drives the pull rod 315 to press down through the pry bar 314. Under the action of the extension portion 316b, the push rod 316 is pulled to rotate counterclockwise around the left end. As the push rod 316 rotates, the greater the amplitude of the push rod 316 lifting the piston 317, the greater the sliding amplitude of the piston 317 is, which facilitates subsequent observation to magnify the offset of the milling cutter 200. The user observes the corresponding scale of the piston 317 through the observation window 101a, which facilitates the user to grasp the fine adjustment amount of the milling cutter 200.

[0067] After observing that the Z-axis of the milling cutter 200 is offset, the threaded rod 321 is rotated to drive the adjustment rod 322 to move to the right, and the second block 329 is driven to move to the right, so that the second block 329 presses against the first block 326 to the right. Since the contact surfaces of the second block 329 and the first block 326 are both arc-shaped surfaces, the first block 326 moves downward and presses against the milling cutter 200, so that the milling cutter 200 is reset and the adjustment is completed.

[0068] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. A device for assisting in fine-tuning the tool fixture of a turning-milling composite machining center, comprising a milling cutter and a clamping assembly for fixing the milling cutter, characterized in that: The clamping assembly is provided with a fine-tuning assembly for fine-tuning the Z-axis milling cutter. The clamping assembly includes an outer cylinder, a tapered sleeve, a movable cylinder, and a spiral sleeve arranged in sequence from bottom to top. The inner wall of the spiral sleeve is threadedly connected to the outer wall of the movable cylinder, and the tapered sleeve is clamped with the movable cylinder. The fine-tuning assembly consists of an observation structure for observing the offset of the milling cutter and an adjustment structure for fine-tuning the offset of the milling cutter; The observation structure includes a fixed cylinder, a contact rod slidably connected to the middle part of the bottom surface of the fixed cylinder and a push rod transmission connected to the top end of the contact rod, the top surface of the fixed cylinder is fixedly connected to the inner top surface of the spiral sleeve, a piston cylinder is provided near the top of the central axis of the fixed cylinder, a piston is provided in the piston cylinder, the bottom of the piston passes through the bottom surface of the piston cylinder and abuts against the outer surface of the push rod, a spring is provided between the piston and the inner top surface of the piston cylinder, an observation window is provided near the middle part of the front side of the outer cylinder wall, an observation groove is provided on the spiral sleeve, the cylinder wall of the fixed cylinder and the cylinder wall of the piston cylinder are provided with openings corresponding to the position of the observation groove, and scales are provided on both sides of the opening on the piston cylinder; The adjustment structure includes a horizontally arranged adjustment rod, two fixed rods symmetrically fixed on the outer bottom surface of the fixed cylinder in the front and rear, and a movable rod slidably connected to the bottom of the fixed rod. The two movable rods are fixedly connected to the same abutment ring, and the abutment ring abuts against the top surface of the milling cutter. The outer end of the adjustment rod is integrally formed with a second abutment block, and the movable rod is provided with a first abutment block adapted to the second abutment block. The bottom end of the contact rod abuts against the top surface of the milling cutter, and the top surface of the contact rod is fixed with a hinge seat, and a pry bar is hinged to the left side of the hinge seat. The rotating shaft of the pry bar is located near the side of the hinge seat, and a pull rod is hinged above the left end of the pry bar. The left end of the top rod is fixed with a horizontal extension part, and the left end of the extension part is hinged to the top end of the pull rod.

2. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 1, characterized in that: The cone sleeve is in a cone shape with a large diameter at the bottom and a small diameter at the top. The lower half of the inner wall of the outer cylinder is in a cone shape that matches the shape of the cone sleeve, and the upper half of the inner wall is in a cylindrical shape that matches the diameter of the spiral sleeve.

3. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 2, characterized in that: The size of the observation window, the size of the observation slot, the size of the opening on the fixed cylinder, and the size of the opening on the piston cylinder decrease in sequence.

4. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 1, characterized in that: The spiral sleeve is clamped on the top of the outer cylinder and the two are rotatably connected. The spiral sleeve passes through the top surface of the outer cylinder. A clamping ring is fixed to the bottom end of the movable cylinder. A clamping groove that matches the size and position of the clamping ring is provided on the inner wall of the cone sleeve near the top, and a plurality of regularly distributed spacing grooves are provided on the cone sleeve.

5. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 4, characterized in that: An axial rod is fixed symmetrically to the front and rear ends of the right end of the push rod, and the axial rod is rotatably connected to the inner wall of the fixed cylinder. The axial rod is located on the left side of the central axis of the fixed cylinder. The push rod is spiral-shaped from the left end to the right end, and the radius of the left end is small and the radius of the right end is large. The bottom end of the piston passes through the piston cylinder and the end face abuts against the middle of the outer surface of the push rod.

6. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 5, characterized in that: The left end of the adjusting rod is horizontally concave, and the second stop block is fixed to the left end of the bottom surface of the protruding part of the left end of the adjusting rod. A threaded rod is fixed in the middle of the front and rear horizontal sections of the right end of the adjusting rod. The right end of the threaded rod passes through the spacing groove and the outer cylinder wall from the inside to the outside in sequence, and the threaded rod is threadedly connected to the outer cylinder wall.

7. The device for assisting fine adjustment of tool holders in a turning-milling machining center according to claim 6, characterized in that: A limiting block is fixed on the top of the movable rod, and the limiting block is slidably connected in the corresponding fixed rod. A vertical movable groove is provided in the movable rod, and the first stop block is fixed on the inner bottom surface of the corresponding movable groove.

8. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 7, characterized in that: The protruding part of the left end of the adjusting rod passes through the movable groove on the corresponding side. The outer surfaces of the second stop block and the first stop block are both arc-shaped, and the arc surface of the second stop block is set downward and the arc surface of the first stop block is set upward. The bottom end height of the second stop block is lower than the top end height of the first stop block.

9. The device for assisting fine adjustment of tool holders in a turning-milling composite machining center according to claim 8, characterized in that: A limiting rod is provided on the left side of the adjusting rod, the left end of the limiting rod passes through the spacing groove and is fixed to the inner wall of the outer cylinder, the right end of the limiting rod is concave and adapted to the left end of the adjusting rod, and the front and rear protruding parts are slidably connected with the corresponding protruding parts of the adjusting rod.

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