A machining device for automobile brake calipers

Abstract

This invention proposes a machining device for automotive brake calipers, belonging to the technical field of brake caliper machining machines. The device features a feed mechanism on its operating table, comprising a servo motor, a feed screw, and a feed nut fitted around it. The feed nut has four sets of tension adjustment components arranged in a circular array inside, with a control component at one end and a receiving block and brake caliper clamping mechanism connected to the top. This invention allows for flexible adjustment of the tightness between the nut and the screw through these tension adjustment components. Initial loosening enables rapid feed, reducing idle travel and improving machining efficiency; subsequent tightening ensures positioning accuracy and meets machining quality requirements. Furthermore, during nut movement, the associated cleaning component initially expands outward without hindering rapid feed, and later automatically inserts into the thread groove for cleaning, eliminating the need for manual machine stoppage, shortening the machining cycle, and reducing wear on the feed mechanism from impurities.

Description

Technical Field

[0001] This invention relates to the field of brake caliper machining technology, and more particularly to a machining device for automotive brake calipers. Background Technology

[0002] In the feed mechanism of a caliper machining lathe, the ball screw plays a crucial role, converting rotary motion into precise linear motion to achieve accurate feed during caliper machining. However, due to the large loads and frequent reciprocating motion during operation, the ball screw is prone to wear. Wear leads to a decrease in the ball screw's accuracy, affecting the dimensional accuracy and surface quality of caliper machining, reducing machining efficiency, and increasing machining costs. Furthermore, excessive wear can shorten the ball screw's lifespan, requiring frequent replacements. This not only increases downtime and production schedules but also raises maintenance costs and workload. Therefore, to ensure the machining accuracy, production efficiency, and economy of caliper machining lathes, effective measures need to be taken to reduce ball screw wear.

[0003] Chinese Patent Application No. 201822245233.4 discloses a high-efficiency feed mechanism for a vertical lathe, including a servo motor; a Z-axis ball screw assembly, a perforated coupling, and an NSK angular contact ball bearing; the Z-axis ball screw assembly is a long cylinder connected to the servo motor via the perforated coupling; the NSK angular contact ball bearing is sleeved on the tail end of the Z-axis ball screw assembly; a motor housing is also included, covering the connection point between the Z-axis ball screw assembly and the servo motor, and connected to the servo motor body; a motor end bearing housing is also included, installed at the end of the motor housing furthest from the servo motor, fixing the motor housing to the Z-axis ball screw assembly. The advantages of this utility model are improved service life of the bearings, screw, and nut, guaranteed screw positioning accuracy, and ensured machining efficiency.

[0004] Traditional lead screw and nut transmission mechanisms in caliper machining equipment cannot simultaneously meet the requirements of rapid feed and precise positioning. A looser fit between the nut and the lead screw is beneficial for reducing wear and rapid movement, but the positioning accuracy is poor. A tight fit between the nut and the lead screw provides high positioning accuracy, but it also results in slow movement speed and greater wear. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology in that the transmission mechanism is difficult to simultaneously meet the requirements of rapid feed and precise positioning. The present invention proposes a machining device for automotive brake calipers.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention includes a processing device operating table, a feeding mechanism installed on the top of the processing device operating table, a gantry frame mounted on the top of the feeding mechanism, and the bottom end of the gantry frame fixedly connected to the processing device operating table. A caliper processing mechanism is installed in the middle of the gantry frame. The caliper processing mechanism is used to process automotive brake calipers. The feeding mechanism includes a servo motor fixedly connected to the top of the processing device operating table. A feed screw is fixedly connected to the output end of the servo motor, and a threaded groove is formed on the outer wall of the feed screw. A feed nut is sleeved on the outside of the feed screw. Four sets of tension adjustment components are arranged in a circular array inside the feed nut. A receiving block is fixedly connected to the top of the feed nut, and a brake caliper clamping mechanism is fixedly connected to the top of the receiving block.

[0007] Preferably, the tension adjustment assembly includes an adjustment groove, which is formed inside the feed nut. A linkage adjustment rod is provided inside the adjustment groove. The radial width of the adjustment groove is greater than the radial width of the linkage adjustment rod. A locking block is fixedly connected to the bottom of the linkage adjustment rod, and the linkage adjustment rod can move inward or outward with the locking block.

[0008] Preferably, a control component is installed at the end of the feed nut, the control component being used to control the linkage adjusting rod to move inward or outward.

[0009] Preferably, the feed nut has an insertion hole inside, the insertion hole is connected to the adjustment groove, the locking block is inserted into the insertion hole, and the locking block is slidably connected to the insertion hole.

[0010] Preferably, the portion of the card block extending out of the insertion hole is embedded inside the threaded groove, and a ball bearing is rotatably connected to the end of the card block, the ball bearing sliding along the threaded groove.

[0011] Preferably, two sets of control adjustment blocks are symmetrically arranged at the end of the linkage adjustment rod, and the control adjustment blocks are inclined inward.

[0012] Preferably, the end of the feed nut is symmetrically provided with two sets of threads, and the two sets of threads are rotated in opposite directions.

[0013] Preferably, the control component includes a dual-axis motor, which is fixedly connected inside the receiving block. A gear is fixedly connected to the output end of the dual-axis motor, and a control ring is engaged at the bottom of the gear.

[0014] Preferably, the control ring is sleeved on the end of the feed nut, and the control ring and the feed nut are threaded together.

[0015] Preferably, a control push plate is fixedly connected inside the control ring, the control push plate is sleeved on the outside of the feed screw, and a control slot is opened on the side of the control push plate, the control slot being inclined.

[0016] Preferably, a cleaning component is installed at the end of the control adjustment block. The cleaning component is used to clean the thread groove near the lower part of the caliper machining mechanism. The cleaning component includes a support block, which is fixedly connected to the bottom end of the control adjustment block.

[0017] Preferably, the bottom of the support block is wrapped with a wiping cotton block, and a spring is provided inside the wiping cotton block. One end of the spring is fixedly connected to the support block, and the other end of the spring is fixedly connected to the wiping cotton block.

[0018] Compared with the prior art, the beneficial effects of the present invention include:

[0019] 1. This invention utilizes four sets of tension adjustment components arranged in a circular array inside the feed nut to flexibly change the tightness of the fit between the nut and the feed screw. In the early feeding stage, the adjustment mechanism loosens the fit between the nut and the screw, reducing friction and movement resistance, enabling rapid feeding, reducing idle travel time, and improving overall machining efficiency. As the machining position approaches, the adjustment mechanism tightens the fit again, facilitating precise displacement control, ensuring caliper positioning accuracy, meeting the requirements for dimensional accuracy and consistency, and improving machining quality.

[0020] 2. During the nut's movement, this invention automatically cleans the screw thread grooves via a cleaning component associated with the adjustment structure. In the early stages of rapid feeding, the cleaning component extends outwards, avoiding contact with the thread grooves to prevent obstruction. Later in the feeding process, when precise positioning is required and the nut and screw are tightly fitted, the cleaning component automatically inserts into the thread grooves for cleaning. This eliminates the need for manual downtime, preventing process interruptions, shortening the processing cycle, and improving production efficiency. Furthermore, the targeted cleaning effectively reduces wear on the feeding mechanism caused by impurities in the thread grooves. Attached Figure Description

[0021] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0022] Figure 1 The schematic diagram shows a front view of a machining apparatus for automotive brake calipers according to an embodiment of the present invention.

[0023] Figure 2The schematic diagram shows a side view of a machining device for automotive brake calipers according to an embodiment of the present invention.

[0024] Figure 3 The schematic diagram shows a cross-sectional view of the nut tension adjustment assembly of a machining device for an automotive brake caliper according to an embodiment of the present invention in an inwardly tightened state.

[0025] Figure 4 The schematic diagram shows a cross-sectional view of the nut tension adjustment assembly of a machining device for an automotive brake caliper according to an embodiment of the present invention in the outwardly relaxed state.

[0026] Figure 5 The schematic diagram shows a cross-sectional view of a tension adjustment assembly portion of a machining device for automotive brake calipers according to an embodiment of the present invention.

[0027] Figure 6 The schematic diagram shows a structural schematic of the linkage adjustment rod portion of a machining device for an automotive brake caliper according to an embodiment of the present invention.

[0028] Figure 7 The schematic diagram shows a cross-sectional view of the feed nut portion of a machining device for automotive brake calipers according to an embodiment of the present invention.

[0029] Figure 8 The schematic diagram shows a cross-sectional view of a control component of a machining device for an automotive brake caliper according to an embodiment of the present invention.

[0030] Figure 9 The schematic diagram shows a cross-sectional view of the control adjustment block and control pusher portion of a machining device for automotive brake calipers according to an embodiment of the present invention.

[0031] Figure 10 The diagram schematically shows a cross-sectional view of a cleaning component of a machining apparatus for automotive brake calipers according to an embodiment of the present invention.

[0032] In the diagram: 1. Processing device operating table; 2. Servo motor; 3. Feed screw; 4. Feed nut; 5. Tension adjustment assembly; 6. Control assembly; 7. Cleaning assembly; 8. Receiving block; 9. Brake caliper clamping mechanism; 10. Gantry frame; 11. Caliper processing mechanism; 501. Adjustment groove; 502. Linkage adjustment rod; 503. Clamping block; 504. Rolling ball; 505. Control adjustment block; 506. Insertion hole; 601. Dual-axis motor; 602. Gear; 603. Control ring; 604. Control push plate; 605. Control slot; 701. Support block; 702. Spring; 703. Wiping cotton block. Detailed Implementation

[0033] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0034] According to one embodiment of the present invention, Figures 1 to 10 As shown. A machining device for automotive brake calipers includes a machining device operating table 1. A feed mechanism is mounted on the top of the machining device operating table 1 for feeding the clamped and fixed automotive brake caliper workpiece to the underside of a caliper machining mechanism 11 for machining. A gantry frame 10 is mounted on the top of the feed mechanism, and the bottom end of the gantry frame 10 is fixedly connected to the machining device operating table 1. The caliper machining mechanism 11 is mounted in the middle of the gantry frame 10. The caliper machining mechanism 11 is used to machine automotive brake calipers. The feed mechanism includes a servo motor 2 fixedly connected to the top of the machining device operating table 1. The output end of the motor 2 is fixedly connected to a feed screw 3, and the outer wall of the feed screw 3 is provided with a threaded groove. A feed nut 4 is sleeved on the outside of the feed screw 3. A receiving block 8 is fixedly connected to the top of the feed nut 4. A brake caliper clamping mechanism 9 is fixedly connected to the top of the receiving block 8. When the output end of the servo motor 2 drives the feed screw 3 to rotate forward and backward, the feed nut 4 will move back and forth outside the feed screw 3. At the same time, the receiving block 8 drives the brake caliper clamping mechanism 9 to move forward or backward, thereby conveying the brake caliper workpiece clamped and fixed above the brake caliper clamping mechanism 9.

[0035] In the machining of automotive brake calipers, the ball screw feed mechanism typically has a fixed tightness between the ball nut and the ball screw, which cannot be changed. This makes it difficult to simultaneously meet the requirements of rapid feed in the early stages and precise positioning in the later stages. The low contact pressure and friction between the nut and the screw help reduce wear. The lower friction also reduces the resistance the nut experiences as it moves along the screw, allowing it to move more quickly under the same driving force, thus achieving a faster feed speed. However, the loose fit cannot provide a stable positioning reference. During the nut's movement, the presence of clearance may cause slight wobble on the screw. If the nut deviates or cannot maintain a precise position, it will lead to poor accuracy. However, when the fit between the nut and the lead screw is too tight, it means that the gap between the nut and the lead screw is extremely small. This allows the position of the nut on the lead screw to be precisely determined. No matter how the lead screw rotates, the nut can follow closely without any wobbling or deviation caused by the gap, which can effectively improve the transmission accuracy. However, the excessively tight fit will also generate a large compressive force on the mating surface between the nut and the lead screw. This will increase the resistance encountered by the nut when it moves on the lead screw. The nut needs to overcome greater resistance to move, which limits its movement speed. Moreover, the large friction between the two will produce greater wear.

[0036] In the early stage of feeding the caliper workpiece downwards towards the caliper processing mechanism 11, high precision is not required. At this time, an overly tight fit between the nut and the lead screw will affect the feeding speed and increase the load and wear. However, when the feeding mechanism feeds the caliper workpiece directly below the caliper processing mechanism 11 and needs to align the caliper workpiece with the drill bit and cutting head in the caliper processing mechanism 11 for processing, higher feeding precision is required to achieve accurate positioning. In order to simultaneously meet the requirements of rapid feeding in the early stage and accurate positioning in the later stage, the present invention has four sets of tension adjustment components 5 arranged in a ring array inside the feeding nut 4. The tension adjustment components 5 are used to adjust the tightness of the fit between the feeding nut 4 and the feeding lead screw 3.

[0037] The tension adjustment assembly 5 includes an adjustment groove 501, which is located inside the feed nut 4. A linkage adjustment rod 502 is installed inside the adjustment groove 501. The radial width of the adjustment groove 501 is greater than the radial width of the linkage adjustment rod 502. A locking block 503 is fixedly connected to the bottom of the linkage adjustment rod 502. An insertion hole 506 is also provided inside the feed nut 4, communicating with the adjustment groove 501. The locking block 503 is inserted into the insertion hole 506, and there is a slidable connection between the locking block 503 and the insertion hole 506. The adjusting rod 502 can move inward or outward with the locking block 503. When the adjusting rod 502 moves outward to the feed nut 4, it will move the row of locking blocks 503 at its bottom outward along the insertion hole 506, thereby making the fit between the locking block 503, the rolling ball 504 and the feed screw 3 looser. When the adjusting rod 502 moves inward to the feed nut 4, it will move the row of locking blocks 503 at its bottom inward along the insertion hole 506, thereby making the fit between the locking block 503, the rolling ball 504 and the feed screw 3 tighter.

[0038] The portion of the locking block 503 extending out of the insertion hole 506 is embedded inside the threaded groove. A rolling ball 504 is rotatably connected to the end of the locking block 503. The rolling ball 504 slides along the threaded groove. When the locking block 503 moves along the threaded groove on the outer wall of the feed screw 3, the rolling ball 504 is used to change the sliding friction between the bottom end of the locking block 503 and the threaded groove of the feed screw 3 into rolling friction, effectively reducing the friction between the locking block 503 and the feed screw 3, thereby reducing wear.

[0039] In the early stage of the feed mechanism moving the brake caliper towards the caliper machining mechanism 11, the linkage adjustment rod 502 is moved outward to reduce the pressure of the clamping block 503 on the feed screw 3, making the fit between the feed nut 4 and the feed screw 3 looser. At this time, rapid feed can be achieved, and the caliper can be quickly moved to the near machining position through the brake caliper clamping mechanism 9, reducing idle travel time and improving overall machining efficiency. When approaching the machining position, the linkage adjustment rod 502 is moved inward to increase the clamping force between the clamping block 503 and the feed screw 3, making the fit between the feed nut 4 and the feed screw 3 tighter. This provides more precise displacement control, and the caliper can be accurately positioned to the required position during caliper machining, which helps to ensure the accuracy and consistency of machining dimensions and improve machining quality. By adjusting the control, the fit between the nut and the screw can be adjusted according to the needs at different positions, while taking into account the requirements of rapid feed in the early stage and precise positioning in the later stage.

[0040] In order to control the movement of the linkage adjusting rod 502 outward or inward, the present invention provides two sets of control adjusting blocks 505 symmetrically arranged at the end of the linkage adjusting rod 502. The control adjusting blocks 505 are inclined inward. At the same time, a control component 6 is installed at the end of the feed nut 4. The control component 6 includes a dual-axis motor 601, which is fixedly connected to the inside of the receiving block 8. The output end of the dual-axis motor 601 is fixedly connected to a gear 602. The bottom of the gear 602 meshes with a control ring 603. The control ring 603 is sleeved on the end of the feed nut 4 and is threadedly connected to the feed nut 4. A control push plate 604 is fixedly connected inside the control ring 603. The control push plate 604 is sleeved on the outside of the feed screw 3. A control slot 605 is opened on the side of the control push plate 604. The control slot 605 is inclined.

[0041] The control adjustment block 505 is inserted into the control slot 605, and there is a sliding connection between the control adjustment block 505 and the control slot 605. When the dual-axis motor 601 is started, its output end drives the gears 602 on both sides to rotate. At the same time, since the gears 602 and the control rings 603 mesh with each other, they can drive the two sets of control rings 603 to rotate. Since the two sets of control rings 603 are respectively threaded to both ends of the feed nut 4, and the threads at both ends of the feed nut 4 rotate in opposite directions, when the control rings 603 rotate, the control rings 603 at both ends will drive the two sets of control push plates 604 to move closer to the feed nut 4 simultaneously. When the control push plate 604 moves towards the feed nut 4, or simultaneously moves away from the feed nut 4, it moves gradually towards the higher end of the inclined control adjustment block 505 along with the control adjustment block 505. The height position of the control push plate 604 in the control slot 605 is limited by the structural design and cannot be changed. Therefore, the position of the linkage adjustment rod 502 is adjusted by the control adjustment block 505, causing the linkage adjustment rod 502 to move outward. Conversely, when both sets of control push plates 604 move away from the feed nut 4 at the same time, the linkage adjustment rod 502 can be moved inward.

[0042] In the early stages of feeding, the fit between the nut and the lead screw is relatively loose. At this time, even if there are some impurities in the thread groove, due to the large fit clearance, these impurities have a relatively small impact on the movement of the nut and will not significantly affect the rapid feeding speed and approximate positional accuracy. Therefore, cleaning is not required to meet the need for rapid workpiece movement to the approximate position. On the contrary, excessive cleaning will affect the rapid feeding due to the friction between the cleaning block and the thread groove. In the later stages, when precise positioning is required and the fit is tighter, stable movement is crucial for machining quality. Impurities in the thread groove may cause uneven fit between the nut and the lead screw, resulting in slight gap changes or obstruction, affecting the precise position of the nut. At the same time, impurities in the thread groove will aggravate the wear of the nut and the lead screw, especially when the fit is tight, the pressure between the two is greater, and the wear may be more obvious.

[0043] To address the aforementioned issues, and to facilitate precise cleaning of the thread grooves at specific locations on the feed screw 3, this invention includes a cleaning component 7 installed at the end of the control adjustment block 505. The cleaning component 7 cleans the thread grooves near the caliper machining mechanism 11. The cleaning component 7 comprises a support block 701, which is fixedly connected to the bottom of the control adjustment block 505. A wiping cotton block 703 is wrapped around the bottom of the support block 701. A spring 702 is installed inside the wiping cotton block 703. One end of the spring 702 is fixedly connected to the support block 701, and the other end is fixedly connected to the wiping cotton block 703. The spring 702 pushes the wiping cotton block 703 outwards, ensuring that the wiping cotton block 703 maintains a good fit with the surface of the thread groove, thus improving the cleaning effect.

[0044] Since the cleaning component 7 is fixed to the bottom of the control adjustment block 505, it can move with the bottom of the control adjustment block 505. In the early feeding stage, when a looser fit is needed between the nut and the lead screw, the linkage adjustment rod 502 is in an outward-expanding state under the control of the control component 6. At this time, the control adjustment block 505 is also in an outward-expanding state, thus moving the cleaning component 7 outward, preventing it from contacting the thread groove on the outer wall of the feed lead screw 3 and thus not cleaning the inside of the thread groove. Conversely, in the later feeding stage when precise positioning is required, the fit between the nut and the lead screw is tighter, and the bottom of the control adjustment block 505 moves the cleaning component 7 inward, allowing the cleaning component 7 to move more smoothly. The cleaning component 7 is inserted into the threaded groove on the outer wall of the feed screw 3. As the feed nut 4 and the tension adjustment component 5 move along the feed screw 3, the cleaning component 7 also moves along the threaded groove on the outer wall of the feed screw 3 to clean its interior. The cleaning component 7 is located in front of the movement of the locking block 503 and the rolling ball 504, and can wipe and clean the threaded groove before they come into contact with the feed screw 3, ensuring that the nut and the screw fit tightly and evenly, thereby improving the positioning accuracy and ensuring the accuracy of the machining dimensions of the automotive brake caliper. At the same time, cleaning the threaded groove can prevent impurities from scraping and grinding the thread surface, extending the service life of the nut and the screw, and reducing equipment maintenance costs.

[0045] While the feed nut 4 moves along the feed screw 3, the thread groove on the outer wall of the feed screw 3 is cleaned in a targeted manner. There is no need to arrange for personnel to stop the machine for cleaning, which avoids the time loss caused by interrupting the processing flow due to cleaning. Simultaneous cleaning makes the processing process more continuous, effectively shortens the entire processing cycle, improves production efficiency, and timely cleaning of impurities in the thread groove can prevent impurities from affecting the fit accuracy between the nut and the screw. During the precise positioning stage, ensuring the cleanliness of the thread groove allows the nut and the screw to fit tightly and evenly, thereby improving positioning accuracy and ensuring the accuracy and consistency of the processing dimensions.

[0046] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A machining device for automotive brake calipers, characterized in that, The device includes a processing device operating table, on the top of which is a feeding mechanism. A gantry frame is mounted on top of the feeding mechanism, and the bottom end of the gantry frame is fixedly connected to the processing device operating table. A caliper processing mechanism is installed in the middle of the gantry frame. The caliper processing mechanism is used to process automotive brake calipers. The feeding mechanism includes a servo motor fixedly connected to the top of the processing device operating table. A feed screw is fixedly connected to the output end of the servo motor, and the outer wall of the feed screw has a threaded groove. A feed nut is sleeved on the outside of the feed screw. Four sets of tension adjustment components are arranged in a circular array inside the feed nut. A receiving block is fixedly connected to the top of the feed nut, and a brake caliper clamping mechanism is fixedly connected to the top of the receiving block. The tension adjustment assembly includes an adjustment groove, which is opened inside the feed nut. A linkage adjustment rod is provided inside the adjustment groove. The radial width of the adjustment groove is greater than the radial width of the linkage adjustment rod. A locking block is fixedly connected to the bottom of the linkage adjustment rod. The linkage adjustment rod can move inward or outward with the locking block. A control component is installed at the end of the feed nut, which is used to control the linkage adjusting rod to move inward or outward.

2. The machining device for automotive brake calipers as described in claim 1, characterized in that, The feed nut is also provided with an insertion hole, which is connected to the adjustment groove. The locking block is inserted into the insertion hole and is slidably connected to the insertion hole.

3. The machining device for automotive brake calipers as described in claim 2, characterized in that, The portion of the card block extending out of the insertion hole is embedded inside the threaded groove, and a ball bearing is rotatably connected to the end of the card block, the ball bearing sliding along the threaded groove.

4. The machining device for automotive brake calipers as described in claim 1, characterized in that, The end of the linkage adjustment rod is symmetrically provided with two sets of control adjustment blocks, which are tilted inward.

5. The machining device for automotive brake calipers as described in claim 1, characterized in that, The end of the feed nut is symmetrically provided with two sets of threads, and the two sets of threads are rotated in opposite directions.

6. The machining device for automotive brake calipers as described in claim 1, characterized in that, The control component includes a dual-axis motor, which is fixedly connected inside the receiving block. A gear is fixedly connected to the output end of the dual-axis motor, and a control ring is engaged at the bottom of the gear.

7. The machining device for automotive brake calipers as described in claim 6, characterized in that, The control ring is sleeved on the end of the feed nut, and the control ring and the feed nut are threaded together.

8. The machining device for automotive brake calipers as described in claim 6, characterized in that, A control push plate is fixedly connected inside the control ring. The control push plate is sleeved on the outside of the feed screw. A control slot is opened on the side of the control push plate. The control slot is inclined.

9. The machining device for automotive brake calipers as described in claim 4, characterized in that, A cleaning component is installed at the end of the control adjustment block. The cleaning component is used to clean the thread groove near the lower part of the caliper machining mechanism. The cleaning component includes a support block, which is fixedly connected to the bottom end of the control adjustment block.

10. The machining device for automotive brake calipers as described in claim 9, characterized in that, The bottom of the support block is wrapped with a wiping cotton block, and a spring is installed inside the wiping cotton block. One end of the spring is fixedly connected to the support block, and the other end of the spring is fixedly connected to the wiping cotton block.

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