Automatic tool changing machine for hot shrinkable tool holder

Abstract

The application relates to the technical field of cutters, and discloses an automatic cutter changing machine for heat-shrunk cutter handles, which comprises a base, a supporting rod is arranged on one side of the base, the base is provided with a positioning taper groove with an opening upward, a tensioning cavity is arranged in communication below the positioning taper groove, the tensioning cavity is provided with a Latin clamp, the supporting rod is provided with a sliding block, the sliding block is provided with a central hole, and the central hole of the sliding block is slidably connected with the supporting rod. Through the arrangement of the fine clamping part, the floating clamping part and the driving rod, the cutter rod part and the cutter end part are clamped by the fine clamping part and the floating clamping part respectively, the fine clamping part plays the role of accurate positioning, and the floating clamping part plays the role of auxiliary floating clamping of the cutter end part. The advantage of the arrangement is that the fine clamping part clamps the cutter rod part closer to the cutter handle clamping port, the coincidence degree between the cutter and the cutter handle clamping port can be improved, and when the cutter enters the cutter handle port.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, specifically to an automatic tool changer for heat-shrink tool holders. Background Technology

[0002] The principle of heat-shrink tool holders is to use the difference in thermal expansion coefficients between the tool holder and the tool to achieve a powerful and high-precision clamping system for the tool. The tool holder material is made of special stainless steel for heat-shrinking with a high thermal expansion coefficient, achieving low-temperature heat-shrinking at 300 degrees Celsius. Using a simple hot air heating device similar to an industrial blower, it can handle all machining processes from high-speed finishing to heavy cutting, including milling, drilling, and reaming. Existing tool changing equipment for heat-shrink tools is relatively simple, requiring manual adjustment of the tool clamping length and manual control of the heating time. The clamping process is inefficient and poses a risk of injury from high temperatures. The main problem this invention addresses is how to improve the clamping efficiency of heat-shrink tool holders. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic tool changer for heat-shrink tool holders, which overcomes the above-mentioned defects in the prior art.

[0004] The present invention is achieved through the following technical solution.

[0005] An automatic tool changer for heat-shrinkable tool holders according to the present invention includes a base, a support rod on one side of the base, a positioning conical groove with an upward opening on the base, a tensioning cavity connected to the lower side of the positioning conical groove, a Latin clamping device in the tensioning cavity, a sliding block on the support rod, a central hole on the sliding block, the central hole of the sliding block slidably connecting to the support rod, a connecting rod at one end of the sliding block, a heating element at the end of the connecting rod, a heating groove on the side wall of the heating groove, an air outlet on the opening of the air outlet, an electric heating wire at the opening of the air outlet, a telescopic rod on the upper side of the heating element, a fixed body at the upper end of the telescopic rod, a sliding groove on the fixed body, a driving rod slidably mounted on the sliding groove, a precision clamping part at the lower end of the driving rod, a pressure sensor and a tension sensor between the driving rod and the precision clamping part, a central groove in the middle of the fixed body, a floating clamping part in the central groove of the fixed body, the floating clamping part being slidably connected to the central groove of the fixed body.

[0006] In a further technical solution, the slide wall is connected to a power chamber, the power chamber wall is rotatably equipped with a power gear, a rack is provided on one side of the drive rod, the rack meshes with the power gear, and a motor that drives the power gear to rotate is installed in the power chamber wall.

[0007] In a further technical solution, the precision clamping part includes a precision clamping body, which is connected to the lower end of the drive rod. The precision clamping body has a through groove at its center, and the through groove wall has a sliding groove. A stop head is slidably provided in the sliding groove, and the stop head can abut against the side of the root of the tool.

[0008] A further technical solution includes a sliding rod slidably disposed within the chute, a guide groove on one side of the sliding rod, a turntable rotatably disposed on one side wall of the chute, a spiral guide strip disposed on the side of the turntable near the guide groove of the sliding rod, the spiral guide strip cooperating with the guide groove, a conical tooth disposed on one side of the turntable, an active conical tooth rotatably disposed near the conical tooth of the turntable, the active conical tooth meshing with the conical tooth of the turntable, and a drive motor for driving the active conical tooth being disposed in the precision clamping body.

[0009] In a further technical solution, the precision clamping part includes a floating clamping body, a connecting spring connecting the floating clamping body and the central groove wall of the fixed body, a clamping groove in the middle of the floating clamping body, a tool groove connected to the upper side of the clamping groove, a sliding groove in the wall of the clamping groove, and the abutment head slidably mounted on the sliding groove of the clamping groove wall.

[0010] In a further technical solution, a telescopic rod is provided in the groove of the clamping groove wall, and the telescopic rod of the clamping groove pushes the abutment head to extend and retract to clamp the end of the cutting tool.

[0011] In a further technical solution, a threaded groove is provided on one side of the sliding block, the threaded groove of the sliding block is connected to the center hole of the sliding block, and a locking threaded rod is threadedly connected to the threaded groove of the sliding block, the locking threaded rod can abut against the support rod.

[0012] In a further technical solution, the support rod is provided with an electric guide rail, and the slider of the electric guide rail of the support rod is connected to the sliding block.

[0013] The beneficial effects of this invention are:

[0014] The present invention discloses an automatic tool changer for heat-shrink tool holders. By setting up a precision clamping part, a floating clamping part, and a drive rod, the tool shank and the tool end are clamped by the precision clamping part and the floating clamping part, respectively. The precision clamping part plays a role in precise positioning, while the floating clamping part plays a role in assisting in floatingly clamping the tool end. The advantage of this setting is that the precision clamping part clamps the tool shank closer to the tool holder clamping opening, which can improve the overlap between the tool and the tool holder clamping opening. When the tool enters the tool holder opening, the tool holder clamping opening provides a positioning effect for the tool. The floating clamping of the floating clamping part does not seriously damage the angle of the tool, which is conducive to the smooth entry of the tool into the tool holder clamping opening.

[0015] This invention discloses an automatic tool changer for heat-shrink tool holders. By incorporating a pressure sensor, tension sensor, telescopic rod, and drive rod, the floating clamping part first relaxes, and the drive rod moves the precision clamping part downwards. The pressure sensor detects the pressure; if the pressure between the precision clamping part and the drive rod is high, it indicates that the tool holder is not sufficiently expanded and heating needs to continue until the pressure sensor pressure decreases. At this point, the drive rod can move the precision clamping part to insert the tool holder into the tool holder clamping hole. This achieves efficient tool installation, avoiding the situation where excessive heating time leads to low installation efficiency. It eliminates the need for manually setting the heating time or conducting manual testing, resulting in higher efficiency and safety.

[0016] When the tool holder needs to cool and clamp the tool, the precision clamping part clamps the tool holder again. The telescopic rod drives the drive rod to move slightly upward through the floating clamping part. The tension sensor detects the tension value. When the tension value of the tension sensor exceeds the set value, we can determine that the tool holder has cooled down in time and the tool has been locked, thus completing the quick automatic tool clamping function of the heat shrink tool holder. By setting the tension sensor, the clamping degree of the tool holder can be detected at any time, which can achieve efficient tool installation and removal, avoiding the inefficiency of manual operation and avoiding many problems caused by manually trying to adjust the tightness of the tool, which may damage the tool installation length. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point B;

[0022] Figure 4 yes Figure 2 A magnified structural diagram at point C. Detailed Implementation

[0023] The following is combined Figure 1-4 The present invention will be described in detail below. For ease of description, the directions referred to below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of the projection relationship are consistent in all directions: up, down, left, right, front, and back.

[0024] An automatic tool changer for heat-shrink tool holders, as described in Figures 1-4, includes a base 10. A support rod 11 is provided on one side of the base 10. The base 10 has an upward-opening positioning conical groove 15. A tensioning cavity 46 is connected to the lower side of the positioning conical groove 15. A Latin clamp is provided in the tensioning cavity 46. A sliding block 12 is provided on the support rod 11. The sliding block 12 has a central hole, which is slidably connected to the support rod 11. A connecting rod 13 is provided at one end of the sliding block 12. A heating element 14 is provided at the end of the connecting rod 13. The heating element 14 has a heating groove 17, and the sidewall of the heating groove 17 is provided with… The device has an air outlet 19, with an electric heating wire 18 at the opening of the air outlet 19. A telescopic rod 20 is provided on the upper side of the heating body 14. A fixed body 31 is provided at the upper end of the telescopic rod 20. The fixed body 31 has a sliding groove 32. A drive rod 21 is slidably mounted on the sliding groove 32. A precision clamping part 41 is provided at the lower end of the drive rod 21. A pressure sensor 44 and a tension sensor 45 are provided between the drive rod 21 and the precision clamping part 41. A central groove is provided in the middle of the fixed body 31. A floating clamping part 42 is provided in the central groove of the fixed body 31. The floating clamping part 42 is floatingly connected to the central groove of the fixed body 31.

[0025] The heat-shrink tool holder to be installed or removed is placed in the positioning cone groove 15 for positioning. The Latin clamp in the tensioning cavity 46 tightens the Latin clamp of the tool holder, which locks the tool holder. The sliding block 12 moves up and down relative to the support rod 11. The sliding block 12 drives the heating element 14 to move to the tool holder clamping position through the connecting rod 13. The tool is placed between the upper and lower floating clamping part 42 and the fine clamping part 41. The fine clamping part 41 clamps the tool holder, and the floating clamping part 42 clamps the end of the tool. Gas is sprayed out of the air outlet 19, and the electric heating wire 18 heats the gas, thereby heating the tool holder clamping part. The floating clamping part 42 is released first, and the drive rod 21 drives the fine clamping part 41 to move down. The pressure sensor 44 detects the pressure. When the pressure between the fine clamping part 41 and the drive rod 21 is released, the pressure sensor 44 detects the pressure. The large pressure indicates that the tool holder is not fully expanded and heating needs to continue until the pressure sensor 44 reduces. Then, the drive rod 21 can move the precision clamping part 41 to insert the tool holder into the tool holder clamping hole. The tool is positioned in the clamping hole, and the floating clamping part 42 clamps the upper end of the tool. The telescopic rod 20, through the floating clamping part 42, moves the tool into the clamping hole, completing the installation. After a short time, the precision clamping part 41 clamps the tool holder again, and the telescopic rod 20, through the floating clamping part 42, moves the drive rod 21 slightly upward. The tension sensor 45 detects the tension value. When the tension value of the tension sensor 45 exceeds the set value, we can confirm that the tool holder has cooled down sufficiently and the tool has been locked, completing the rapid automatic tool clamping function for the heat-shrink tool holder.

[0026] Preferably, the wall of the slide groove 32 is connected to a power cavity 38, the wall of the power cavity 38 is rotatably provided with a power gear 33, a rack 39 is provided on one side of the drive rod 21, the rack 39 meshes with the power gear 33, and a motor that drives the power gear 33 to rotate is installed in the wall of the power cavity 38.

[0027] The motor in the power chamber 38 drives the power gear 33 to rotate. The rotation of the power gear 33 drives the drive rod 21 to slide up and down in the slide groove 32 through the rack 39, thereby providing power for the movement of the drive rod 21.

[0028] Preferably, the precision clamping part 41 includes a precision clamping body 22, which is connected to the lower end of the drive rod 21. The precision clamping body 22 has a through groove 23 at its center, and the wall of the through groove 23 has a sliding groove 25. The sliding groove 25 is slidably provided with an abutment head 24, which can abut against the side of the root of the tool.

[0029] When the sliding rod 26 slides along the groove 25 toward the axis passing through the groove 23, the sliding rod 26 drives the abutment head 24 to move closer to each other, thereby abutting against the side of the tool holder and completing the function of fixing the tool holder part.

[0030] Preferably, a sliding rod 26 is slidably disposed within the slide groove 25, a guide groove is provided on one side of the sliding rod 26, a turntable 27 is rotatably disposed on one side wall of the slide groove 25, a spiral guide strip is provided on the side of the turntable 27 near the guide groove of the sliding rod 26, the spiral guide strip cooperates with the guide groove, a conical tooth is provided on one side of the turntable 27, an active conical tooth 29 is rotatably disposed near the conical tooth of the turntable 27, the active conical tooth 29 meshes with the conical tooth of the turntable 27, and the precision clamping body 22 is provided with a drive motor 30 for driving the active conical tooth 29.

[0031] When the drive motor 30 starts, it drives the active bevel gear 29 to rotate, which in turn drives the turntable 27 to rotate. The turntable 27 then drives the sliding rod 26 to slide in the slide groove 25, thus providing power for the sliding of the sliding rod 26 and ensuring that all the sliding rods 26 move synchronously, which plays a role in centering.

[0032] Preferably, the precision clamping part 41 includes a floating clamping body 43, and a connecting spring 37 is connected between the floating clamping body 43 and the central groove wall of the fixed body 31. The floating clamping body 43 is provided with a clamping groove 36 in the middle, and a tool groove 35 is provided on the upper side of the clamping groove 36. The wall of the clamping groove 36 is provided with a sliding groove, and the abutment head 24 is slidably provided in the sliding groove of the wall of the clamping groove 36.

[0033] The abutment head 24 in the clamping groove 36 slides inward, all abutment heads 24 move toward the center, and the abutment head 24 is close to the end of the tool that can be fixed.

[0034] Preferably, a telescopic rod is provided in the groove of the wall of the clamping groove 36, and the telescopic rod of the groove of the clamping groove 36 pushes the abutment head 24 to telescopically clamp the end of the cutter.

[0035] The telescopic rod drives the abutment head 24 to move in the slide groove, and the telescopic rod provides power for the movement of the abutment head 24.

[0036] Preferably, the sliding block 12 has a threaded groove on one side, the threaded groove of the sliding block 12 is connected to the center hole of the sliding block 12, and the threaded groove of the sliding block 12 is threadedly connected to a locking threaded rod 40, which can abut against the support rod 11.

[0037] The locking threaded rod 40 rotates in the threaded groove of the sliding block 12, and the end of the locking threaded rod 40 can abut against the side wall of the support rod 11, thereby locking the relative position of the sliding block 12 and the support rod 11.

[0038] Preferably, the support rod 11 is provided with an electric guide rail, and the slider of the electric guide rail of the support rod 11 is connected to the sliding block 12.

[0039] The electric guide rail on the support rod 11 can drive the sliding block 12 to slide up and down relative to the support rod 11, and the electric guide rail provides power for the sliding of the sliding block 12.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic tool changer for heat-shrink tool holders, comprising a base, characterized in that... The base has a support rod on one side and an upward-opening positioning conical groove. A tensioning cavity is connected to the lower side of the positioning conical groove, and a Latin clamp is installed in the tensioning cavity. The support rod has a sliding block with a central hole, which slidably connects to the support rod. A connecting rod is located at one end of the sliding block, and a heating element is located at the end of the connecting rod. The heating element has a heating groove, and an air outlet is located on the side wall of the heating groove. An electric heating wire is located at the opening of the air outlet. A telescopic rod is located on the upper side of the heating element, and a fixed body is located at the upper end of the telescopic rod. The fixed body has a sliding groove, and a drive rod is slidably mounted on the sliding groove. A precision clamping part is located at the lower end of the drive rod. A pressure sensor and a tension sensor are located between the drive rod and the precision clamping part. A central groove is located in the middle of the fixed body, and a floating clamping part is located within the central groove of the fixed body. The floating clamping part is buoyantly connected to the central groove of the fixed body. Place the heat-shrink tool holder to be installed or removed into the positioning cone groove for positioning. Place the tool between the upper and lower floating clamping parts and the fine clamping part. The fine clamping part clamps the tool holder, and the floating clamping part clamps the end of the tool. Gas is sprayed from the air nozzle, and the electric heating wire heats the gas, thereby heating the clamping part of the tool holder. The floating clamping part first relaxes, and the drive rod moves the fine clamping part downward. The pressure sensor detects the pressure. When the pressure between the fine clamping part and the drive rod is high, it indicates that the tool holder is not expanded enough and heating needs to continue until the pressure sensor pressure decreases. Then, the drive rod can move the fine clamping part to insert the tool holder into the tool holder clamping hole. The tool is positioned in the tool holder clamping hole. The floating clamping part clamps the upper end of the tool, and the telescopic rod moves the tool into the tool holder clamping hole through the floating clamping part, completing the installation function. After a period of time, the fine clamping part clamps the tool holder again, and the telescopic rod moves the drive rod upward through the floating clamping part. The tension sensor detects the tension value. When the tension value of the tension sensor exceeds the set value, it can be determined that the tool holder has cooled down to the required level and the tool has been locked.

2. The automatic tool changer for heat-shrink tool holders according to claim 1, characterized in that... The chute wall is connected to a power chamber, the power chamber wall is rotatably equipped with a power gear, a rack is provided on one side of the drive rod, the rack meshes with the power gear, and a motor that drives the power gear to rotate is installed in the power chamber wall.

3. The automatic tool changer for heat-shrink tool holders according to claim 1, characterized in that... The precision clamping part includes a precision clamping body, which is connected to the lower end of the drive rod. The precision clamping body has a through groove at its center, and the through groove wall has a sliding groove. A stop head is slidably provided in the sliding groove, and the stop head can abut against the side of the root of the tool.

4. The automatic tool changer for heat-shrink tool holders according to claim 3, characterized in that... A sliding rod is slidably disposed within the chute. A guide groove is provided on one side of the sliding rod. A turntable is rotatably disposed on one side wall of the chute. A spiral guide strip is provided on the side of the turntable near the guide groove of the sliding rod. The spiral guide strip cooperates with the guide groove. A conical tooth is provided on one side of the turntable. An active conical tooth is rotatably disposed near the conical tooth of the turntable. The active conical tooth meshes with the conical tooth of the turntable. The precision clamping body is provided with a drive motor that drives the active conical tooth.

5. The automatic tool changer for heat-shrink tool holders according to claim 1, characterized in that... The precision clamping part includes a floating clamping body, and a connecting spring is connected between the floating clamping body and the central groove wall of the fixed body. The floating clamping body has a clamping groove in the middle, and a tool groove is connected to the upper side of the clamping groove. The clamping groove wall has a sliding groove, and a stop head is slidably provided in the sliding groove of the clamping groove wall.

6. The automatic tool changer for heat-shrink tool holders according to claim 5, characterized in that... The clamping groove wall is provided with a telescopic rod, which pushes the abutment head to extend and retract to clamp the end of the cutter.

7. The automatic tool changer for heat-shrink tool holders according to claim 1, characterized in that... The sliding block has a threaded groove on one side, which is connected to the center hole of the sliding block. The threaded groove of the sliding block is threadedly connected to a locking threaded rod, which can abut against the support rod.

8. An automatic tool changer for heat-shrink tool holders according to claim 1, characterized in that... The support rod is equipped with an electric guide rail, and the slider of the electric guide rail of the support rod is connected to the sliding block.

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