Combined machining die, device and method for blind hole of inner wall of shaft sleeve

Abstract

The application belongs to the technical field of shaft sleeve processing, and discloses a combined processing die, device and method for blind holes in the inner wall of a shaft sleeve, wherein the processing die comprises a positioning cylinder, a separation ring and a punch stamping assembly; the positioning cylinder is provided with a positioning slide; the punch stamping assembly comprises a punch, a retainer and a rebound device; the retainer is provided with a slide for mounting the punch; the outer walls of the separation ring and the retainer are attached to the inner wall of the positioning cylinder; the punch is pushed out of the positioning slide under the action of an external pressure driving element; and the punch is reset under the action of the rebound device after the pressure driving element is removed; the separation ring and the retainer are arranged at intervals in the blind hole processing area, and the separation ring is sequentially stacked in the non-processing area of the blind hole. The processing device comprises a base, a clamp, the above-mentioned processing die and a pressure driving element. The processing method comprises assembling the die, installing the die, installing the shaft sleeve and stamping the blind hole. The application can flexibly process blind holes with different layout forms, different numbers and different depths through the combined die.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shaft sleeve processing, and relates to a combined shaft sleeve inner wall blind hole processing die and device, and a combined shaft sleeve inner wall blind hole processing method. BACKGROUND

[0002] Shaft sleeves are commonly used in heavy machinery and wind power fields, and the inner wall of the shaft sleeve is provided with a blind hole for storing lubricating grease, which plays a lubricating role in the rotation of the shaft. Under the action of impact dynamic load and extremely low linear speed, the lubrication mode of the shaft sleeve is often boundary mixed lubrication, and it is difficult to establish a continuous and stable oil film. With the rupture of the oil film, partial solid contact between the shaft sleeve and the shaft neck will occur, the wear coefficient will increase, and the service life of the shaft sleeve will be greatly reduced. In view of the harsh working conditions of ultra-low speed rotation and heavy load, different shapes and different distribution forms of blind holes are processed on the inner wall of the shaft sleeve, which can improve the grease storage capacity, realize secondary uniform lubrication, store abrasive particles, and effectively dissipate heat.

[0003] In the prior art, there are mainly two methods for processing the blind hole in the inner wall of the shaft sleeve, one is milling through a multi-axis machine tool and a special cutter, and the other is stamping through a die. Among them, the milling method for processing the blind hole has defects such as poor positioning accuracy, many processing burrs, long processing cycle, low production efficiency and inability to process special-shaped blind holes. The existing die stamping processing method has complicated processing steps, cannot be formed at one time, is low in efficiency, and the die is single, can only process blind holes of one distribution form. For processing requirements of different working conditions, the processing form of the blind hole cannot be flexibly adjusted. If multiple dies are made, it is time-consuming and laborious, and the processing cost increases sharply. SUMMARY

[0004] The present application aims to provide a combined shaft sleeve inner wall blind hole processing die, device and method, so as to achieve the purpose of processing multiple layout blind holes by combining different forms with one die.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows:

[0006] A combined shaft sleeve inner wall blind hole processing die, comprising a positioning cylinder, a plurality of separation rings and a plurality of punch pin stamping assemblies;

[0007] A plurality of strip-shaped positioning slides are arranged on the circumferential surface of the positioning cylinder, and the positioning slides are uniformly and spacedly distributed along the circumference of the positioning cylinder. At least two locking pins for circumferential positioning are fixedly arranged on one end face of the positioning cylinder.

[0008] The punch pin stamping assembly comprises a punch pin for stamping a blind hole, a holder for mounting the punch pin, and a springback device for resetting the punch pin, one end of the punch pin is a spherical surface matched with the blind hole, the other end is suspended outside the holder, the holder is provided with a slide for mounting the punch pin, and the punch pin is movably arranged in the slide through the springback device;

[0009] The outer wall of the separation ring and the holder is attached to the inner wall of the positioning cylinder, and each column of punch pins corresponds to a positioning slide on the positioning cylinder; the punch pin is pushed out of the positioning slide under the action of the external pressure driving element, and a blind hole is stamped on the inner wall of the shaft sleeve; when the pressure driving element is removed, the punch pin is reset under the action of the springback device; in the blind hole processing area, the separation ring is arranged in the holder, and the separation ring provides support for the holder; in the non-processing area of the blind hole, a plurality of separation rings are arranged in sequence.

[0010] As a limitation of the application, the holder comprises a plurality of U-shaped pieces and a plurality of connecting plates, the U-shaped pieces and the connecting plates are connected in sequence and spaced apart to form a circular structure, and the two ends of the connecting plate are slidably arranged on the adjacent two U-shaped pieces; the area between the two adjacent U-shaped pieces forms a slide for mounting the punch pin, the connecting plate is fixedly connected with the punch pin to drive the punch pin to move, and the connecting plate drives the punch pin to reset through the springback device.

[0011] As a further limitation of the application, the springback device comprises a slide rod fixedly arranged on the U-shaped piece and a spring sleeved on the slide rod, and one springback device is fixedly arranged on each side of the U-shaped piece, and the two ends of the connecting plate are slidably arranged on the two slide rods and abut against one end of the spring.

[0012] As a further limitation of the application, the two side plates of the U-shaped piece are provided with through holes, and the slide rod is fixedly arranged in the through hole.

[0013] As another limitation of the application, the punch pin is provided with a clamping groove, and the connecting plate is clamped in the clamping groove of the punch pin to drive the punch pin to move.

[0014] As a limitation of the application, the closed side of the U-shaped piece is a circular arc surface attached to the positioning cylinder.

[0015] A combined shaft sleeve inner wall blind hole processing device comprises a base, a clamp, a combined shaft sleeve inner wall blind hole processing die, and a pressure driving element, the clamp is fixedly arranged on the base and used for clamping the shaft sleeve, the clamp is provided with at least two positioning holes, the die is inserted into the shaft sleeve, and the locking pin on the positioning cylinder is inserted into the positioning hole of the clamp for circumferential positioning, and the pressure driving element is fixedly arranged on the base and used for extruding the punch pin to move towards the inner wall of the shaft sleeve.

[0016] As a kind of combined shaft sleeve inner wall blind hole processing device of the present application, the pressure driving part includes hydraulic cylinder and the stamping head fixed on the telescopic rod of hydraulic cylinder, and the end of stamping head is circular truncated cone type.

[0017] A kind of combined shaft sleeve inner wall blind hole processing method, the method for processing blind hole using above-mentioned combined shaft sleeve inner wall blind hole processing device is as follows:

[0018] S1, assemble mould: according to the layout form of blind hole on shaft sleeve, install coaxially in positioning cylinder, in non-blind hole processing area, sequentially superimposed spacer ring, form support, in blind hole processing area, spacer ring and retainer are arranged at intervals, the striker on retainer is located in the positioning slide of positioning cylinder, so that spacer ring forms the axial spacing of each row of blind holes, and the spacing of positioning slide forms the circumferential spacing of each column of blind holes;

[0019] S2, install mould: the mould is positioned coaxially in the inside of shaft sleeve;

[0020] S3, install shaft sleeve: the shaft sleeve is assembled on the clamp, so that the shaft sleeve is arranged coaxially with the stamping head, and the locking pin is inserted into the positioning hole of the clamp for circumferential positioning;

[0021] S4, stamp blind hole: start pressure driving part, so that stamping head is inserted into the inside of mould, extrude striker to move to the inner wall of shaft sleeve, after stamping is completed, stamping head is withdrawn, and springback device resets striker.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] (1) The processing mould of the present application can be combined according to the layout form of blind hole on the shaft sleeve to be processed, especially for heavy machinery under special working conditions, the layout of blind hole needs to be processed flexibly according to the actual working condition, and the layout mode is flexible and changeable, the mould of the present application can process blind holes with different layout forms as needed, without the need to make more forms of mould, the manufacturing cost is greatly reduced, and the processing efficiency is greatly improved by adaptively assembling the mould of the present application;

[0024] (2) The mould of the present application is easy to process, can be assembled at will, the processing cost is low, and multiple strikers are directly stamped to form blind holes without using tools, so that the processing burr is less, the depth is uniform, and the processing precision is high;

[0025] (3) The mould of the present application can process blind holes with different row spacing, different column spacing and different size by replacing different positioning cylinders, spacer rings, retainers and strikers, and the combination form is various, and the processing cost is reduced;

[0026] (4) The present application can design different shapes of the firing pin according to the needs, and the blind holes of different shapes, numbers and layouts can be processed through the combined die, and the blind holes of different depths can be processed by replacing the stamping head of different diameters, so that the machining requirements of the shaft sleeve parts of various models and various blind hole numbers can be met, and the practicality is high;

[0027] (5) The machining device of the present application can accurately process the blind holes by assembling the firing pin to the corresponding position through the stamping mode, greatly improves the machining precision, and does not need to be reworked, and the machining efficiency is improved;

[0028] (6) The machining method of the present application can process blind holes of different layouts by assembling different forms of dies, reduce the production of dies, reduce the production cost, and abandon the traditional milling process, and accurately process the blind holes on the shaft sleeve, and effectively improve the machining efficiency.

[0029] In summary, the present application can process blind holes of different layout forms, different numbers and different depths through the combined die, and is suitable for processing the blind holes in the shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be described in further detail below in combination with the drawings and specific embodiments.

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the machining die of the present application embodiment 1 installed in the shaft sleeve.

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the present application embodiment 1.

[0033] Figure 3 It is a schematic diagram of the installation position structure of the spacer ring and the firing pin stamping assembly of the present application embodiment 1.

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of the firing pin stamping assembly of the present application embodiment 1.

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the firing pin of the present application embodiment 1.

[0036] Figure 6 It is a schematic diagram of the three-dimensional structure of the retainer of the present application embodiment 1.

[0037] Figure 7 It is a schematic diagram of the three-dimensional structure of the rebound device installed on the U-shaped piece of the present application embodiment 1.

[0038] Figure 8 It is a schematic diagram of the top view structure of the rebound device installed on the U-shaped piece of the present application embodiment 1.

[0039] Figure 9A schematic diagram of the perspective structure of embodiment 2 of the present application;

[0040] Figure 10 A schematic diagram of the top structure of the fixture of embodiment 2 of the present application.

[0041] In the figure: 1, positioning cylinder; 11, positioning slide; 12, locking pin; 2, separation ring; 3, striker stamping assembly; 31, striker; 311, clamping groove; 32, retainer; 321, U-shaped piece; 3211, through hole; 322, connecting plate; 33, rebound device; 331, slide rod; 332, spring; 4, shaft sleeve; 5, base; 6, fixture; 61, positioning hole; 7, pressure driving piece; 8, stamping head. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for illustration and understanding of the present application, and are not intended to limit the present application.

[0043] Example 1: Machining die of combined shaft sleeve inner wall blind hole

[0044] As shown in Figure 1 , the present embodiment includes a positioning cylinder 1, a plurality of separation rings 2 and a plurality of striker stamping assemblies 3, the positioning cylinder 1 is used for insertion into the shaft sleeve 4, the separation rings 2 and the striker stamping assemblies 3 are located in the positioning cylinder 1, through the free combination of the separation rings 2 and the striker stamping assemblies 3, a plurality of forms of machining dies are formed, the machining die is placed in the shaft sleeve, and a plurality of blind holes with different layouts are machined through the striker stamping assemblies 3.

[0045] As shown in Figure 2 , the positioning cylinder 1 is cylindrical, a plurality of positioning slides 11 are provided on the circumferential surface of the positioning cylinder 1, the positioning slides 11 are strip-shaped and vertically arranged along the axial direction of the positioning cylinder 1, forming vertical long slot holes, the positioning slides 11 are uniformly and spacedly distributed in the circumferential direction of the positioning cylinder 1, and the spacing distance is set according to the column spacing of the blind holes on the shaft sleeve 4. Four locking pins 12 are uniformly and fixedly provided on one end surface of the positioning cylinder 1, for circumferential positioning, to prevent relative rotation between the positioning cylinder 1 and the shaft sleeve 4.

[0046] As shown in Figure 3 , the separation ring 2 is annular in structure, providing support force for the retainer 32 and the striker 31. The outer diameter of the separation ring 2 matches the inner diameter of the positioning cylinder 1, the inner diameter of the separation ring 2 matches the outer diameter of the stamping head 8 of the pressure driving piece 7, and the thickness of the separation ring 2 matches the spacing of each row of blind holes on the shaft sleeve 4. It should be noted that each row of blind holes refers to the blind holes arranged in the circumferential direction of the shaft sleeve 4, and each column of blind holes refers to the blind holes arranged in the axial direction of the shaft sleeve 4.

[0047] As shown in Figure 4As shown, the striker stamping assembly 3 comprises strikers 31, a retainer 32 and a rebound device 33. The strikers 31 are provided with a plurality of strikers 31 which are moved towards the inner wall of the sleeve 4 under the action of the pressure driving member 7 to stamp out the blind hole. The retainer 32 is used to mount the strikers 31 and provide support for the strikers 31. The rebound device 33 is used to reset the strikers 31.

[0048] As shown in the Figure 5 , the striker 31 is a cylinder with a convex spherical surface at one end, and the size of the spherical surface matches the size of the blind hole. A ring of clamping grooves 311 is provided on the circumferential surface of the striker 31. During installation, the clamping grooves 311 are used to position the strikers 31, and both ends of the strikers 31 are suspended outside the retainer 32.

[0049] As shown in the Figure 6 , Figure 7 , the retainer 32 comprises a plurality of U-shaped pieces 321 and a plurality of connecting plates 322. The U-shaped pieces 321 and the connecting plates 322 are connected in sequence and at intervals to form a circular structure. The two side plates of the U-shaped piece 321 are inclined, i.e. the extension lines of the two side plates both pass through the center of the retainer 32. A through hole 3211 is provided on the upper part of each of the two side plates of the U-shaped piece 321, and a rebound device 33 is fitted in each through hole 3211. The closed side of the U-shaped piece 321 is a circular arc surface which is attached to the inner wall of the positioning cylinder 1. The two ends of the connecting plate 322 are slidingly arranged on the side plates of the adjacent two U-shaped pieces 321 and are reset by the rebound device 33. The area between the adjacent two U-shaped pieces 321 forms a slide for mounting the strikers 31. The connecting plate 322 is clamped in the clamping groove 311 of the striker 31, and the striker 31 moves with the connecting plate 322.

[0050] As shown in the Figure 8 , the rebound device 33 comprises a slide rod 331 and a spring 332. The slide rod 331 is fixedly arranged in the through hole 3211 of the U-shaped piece 321, and the spring 332 is sleeved on the slide rod 331. The two ends of the connecting plate 322 are slidingly arranged on the slide rods 331 of the adjacent two U-shaped pieces 321, and one end of the spring 332 abuts against the connecting plate 322. When the striker 31 drives the connecting plate 322 to move towards the inner wall of the sleeve 4 under the action of the pressure driving member 7, the connecting plate 322 moves towards the inner wall of the sleeve 4 along the slide rod 331, and the spring 332 is compressed. After the pressure of the pressure driving member 7 is removed, the spring 332 is reset to drive the connecting plate 322 and the striker 31 to reset.

[0051] When assembling the machining die, the partition ring 2 and the punch pin stamping assembly 3 are both placed in the positioning cylinder 1, and the outer wall of the partition ring 2 and the retainer 32 are attached to the inner wall of the positioning cylinder 1. In the non-machining area of the blind hole, a plurality of partition rings 2 are stacked in sequence to form a support, and the stacking is continued to the machining area of the blind hole. In the machining area of the blind hole, the partition ring 2 is arranged in a spaced manner with the retainer 32, and the partition ring 2 not only provides support for the retainer 32, but also forms the row spacing between each row of blind holes. The punch pin 31 on the retainer 32 is located in the positioning slide 11 of the positioning cylinder 1, that is, there are several rows of blind holes on the shaft sleeve 4, and the positioning slide 11 of the positioning cylinder 1 is correspondingly provided with several rows, and the punch pin 31 on the retainer 32 is correspondingly provided with several rows. After assembly is completed, the end of the punch pin 31 provided with a spherical surface is located in the positioning slide 11 of the positioning cylinder 1, and the other end is suspended outside the retainer 32, and the punch pin 31 is pushed out of the positioning slide 11 under the action of the external pressure driving element 7, and the blind hole is punched on the inner wall of the shaft sleeve 4, and when the pressure driving element 7 is removed, the punch pin 31 is reset under the action of the spring device 33.

[0052] Example 2 Machining device for combined blind hole in inner wall of shaft sleeve

[0053] As shown in Figure 9 , the present embodiment comprises a base 5, a clamp 6, a machining die for combined blind hole in inner wall of shaft sleeve of example 1 and a pressure driving element 7. The base 5 is provided with a punching hole, and the clamp 6 is fixedly arranged on the base 5 and used for clamping the shaft sleeve 4. The clamp 6 adopts a four-jaw chuck of prior art, is horizontally fixed on the base 5, and is coaxially arranged with the punching hole. As shown in Figure 10 , the four chucks of the clamp 6 are each provided with a positioning hole 61 corresponding to the positions of the four locking pins 12 on the positioning cylinder 1. The pressure driving element 7 comprises a hydraulic oil cylinder fixedly arranged on the base 5 and a punching head 8 fixedly arranged on the telescopic rod of the hydraulic oil cylinder. The end of the punching head 8 is in the shape of a circular truncated cone. The punching head 8 is located above the clamp 6 and is coaxially arranged with the clamp 6. The machining die of example 1 is inserted into the shaft sleeve 4, the pressure driving element 7 drives the punching head 8 to extend into the machining die, and is used for extruding the punch pin 31 to move towards the inner wall of the shaft sleeve 4 to punch the blind hole on the shaft sleeve 4. In the implementation process, even if the punching head 8 produces a slight inclination in the long-term use process, the extension into the die will cause a circumferential force on the positioning cylinder 1, but the clamp 6 and the positioning cylinder 1 are positioned by the locking pins 12, which can prevent the positioning cylinder 1 from rotating, thereby ensuring that the punch pin 31 can punch the blind hole at the correct position and further ensuring the machining precision.

[0054] Example 3 Machining method for combined blind hole in inner wall of shaft sleeve

[0055] The present embodiment utilizes the machining device for combined blind hole in inner wall of shaft sleeve of example 2 to machine the blind hole, and the machining method comprises the following steps:

[0056] S1, assemble the die: as Figure 1As shown, according to the layout form of the blind hole on the shaft sleeve 4, the spacer ring 2 and the striker stamping assembly 3 are coaxially installed in the positioning cylinder 1, so that the outer wall of the spacer ring 2 and the retainer 32 is attached to the inner wall of the positioning cylinder 1. In the non-processed area of the blind hole, the spacer ring 2 is stacked in sequence to form a support until it is stacked in the processed area of the blind hole; then in the processed area of the blind hole, the spacer ring 2 and the retainer 32 are arranged at intervals, so that the striker 31 on each retainer 32 is aligned with each row of blind holes to be processed on the shaft sleeve 4, and the striker 31 on the retainer 32 is located in the positioning slide 11 of the positioning cylinder 1, so that each column of strikers 31 formed on all retainers 32 is aligned with each column of blind holes to be processed on the shaft sleeve 4; after assembly, the spacer ring 2 forms the axial spacing of each row of blind holes, and the spacing of the positioning slide 11 forms the circumferential spacing of each column of blind holes, so as to ensure that the position of the striker 31 corresponds to the position of the blind hole to be processed on the shaft sleeve 4 one by one.

[0057] S2, install the mold: coaxially position the mold inside the shaft sleeve 4, so that the outer wall of the mold is attached to the inner wall of the shaft sleeve 4;

[0058] S3, install the shaft sleeve: assemble the shaft sleeve 4 on the clamp 6, so that the shaft sleeve 4 is coaxially arranged with the stamping head 8, and ensure that the stamping head 8 accurately extends into the mold inside the shaft sleeve 4, and at the same time, the locking pin 12 is inserted into the positioning hole 61 of the clamp 6 for circumferential positioning;

[0059] S4, stamping blind hole: start the pressure driving part 7, so that the stamping head 8 is inserted into the mold, and the striker 31 is extruded to move towards the inner wall of the shaft sleeve 4, after stamping is completed, the stamping head 8 is withdrawn, and the rebound device 33 resets the striker 31.

[0060] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the above embodiments of the present application have been described in detail, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A combined machining die for blind hole of inner wall of bushing, characterized in that, The application relates to a combined type inner wall blind hole processing device of a shaft sleeve. The circumferential surface of the positioning cylinder is provided with a plurality of strip-shaped positioning sliding channels which are uniformly and spacedly distributed along the circumference of the positioning cylinder; at least two locking pins for circumferential positioning are fixed on one end surface of the positioning cylinder; The punch pin punch assembly comprises a punch pin for punching a blind hole, a holder for mounting the punch pin, and a rebound device for resetting the punch pin; one end of the punch pin is a spherical surface matched with the blind hole, and the other end is suspended outside the holder; the holder is provided with a sliding channel for mounting the punch pin; the punch pin is movably arranged in the sliding channel through the rebound device; The outer walls of the spacer ring and the holder are attached to the inner wall of the positioning cylinder; each column of punch pins corresponds to a positioning sliding channel on the positioning cylinder; the punch pins are pushed out of the positioning sliding channel under the action of an external pressure driving element, and the blind holes are punched in the inner wall of the shaft sleeve; when the pressure driving element is removed, the punch pins are reset under the action of the rebound device; in the blind hole processing area, the spacer ring and the holder are spacedly arranged; the spacer ring provides support for the holder; in the non-blind hole processing area, the plurality of spacer rings are sequentially stacked; The holder comprises a plurality of U-shaped pieces and a plurality of connecting plates; the U-shaped pieces and the connecting plates are sequentially and spacedly connected to form a circular structure; the two ends of the connecting plate are slidably arranged on the two adjacent U-shaped pieces; the area between the two adjacent U-shaped pieces forms a sliding channel for mounting the punch pin; the connecting plate is fixedly connected with the punch pin to drive the punch pin to move; the connecting plate drives the punch pin to reset through the rebound device; The rebound device comprises a sliding rod fixedly arranged on the U-shaped piece and a spring sleeved on the sliding rod; the two sides of each U-shaped piece are fixedly provided with one rebound device; the two ends of the connecting plate are slidably arranged on the two sliding rods and abut against one end of the spring.

2. The combined machining die for the inner wall blind hole of the bushing according to claim 1, characterized in that, The two side plates of the U-shaped piece are provided with through holes; the sliding rod is fixedly arranged in the through hole.

3. The combined machining die for the inner wall blind hole of the bushing according to claim 2, characterized in that, The punch pin is provided with a clamping groove; the connecting plate is clamped in the clamping groove of the punch pin to drive the punch pin to move.

4. The combined machining die for the inner wall blind hole of the bushing according to claim 3, characterized in that, The closed side of the U-shaped piece is a circular arc surface attached to the positioning cylinder.

5. A combined blind hole processing device for inner wall of a bush, characterized in that, The combined type inner wall blind hole processing device of a shaft sleeve comprises a base, a clamp, the combined type inner wall blind hole processing device of a shaft sleeve in any one of claims 1-4, and a pressure driving element; the clamp is fixedly arranged on the base and used for clamping the shaft sleeve; the clamp is provided with at least two positioning holes; the mold is inserted into the shaft sleeve, and the locking pins on the positioning cylinder are inserted into the positioning holes of the clamp for circumferential positioning; the pressure driving element is fixedly arranged on the base and used for extruding the punch pin to move towards the inner wall of the shaft sleeve.

6. The combined bushing inner wall blind hole processing device according to claim 5, characterized in that, The pressure driving element comprises a hydraulic oil cylinder and a punch head fixedly arranged on the telescopic rod of the hydraulic oil cylinder; the end of the punch head is a circular truncated cone.

7. A combined blind hole processing method for inner wall of a bush, characterized in that, The method for processing the blind hole by using the combined type inner wall blind hole processing device of a shaft sleeve in claim 6 is as follows: S1, assembling the mold: the mold is assembled according to the layout form of the blind holes on the shaft sleeve; the spacer ring and the punch pin punch assembly are coaxially arranged in the positioning cylinder; in the non-blind hole processing area, the spacer rings are sequentially stacked to form support; in the blind hole processing area, the spacer ring and the holder are spacedly arranged; the punch pins on the holder are located in the positioning sliding channel of the positioning cylinder; the spacer ring forms the axial spacing of each row of blind holes; the spacing of the positioning sliding channel forms the circumferential spacing of each column of blind holes; S2, installing the mold: the mold is coaxially positioned in the inner part of the shaft sleeve. S3, install the shaft sleeve: the shaft sleeve is assembled on the clamp, the shaft sleeve is coaxial with the stamping head, and the locking pin is inserted into the positioning hole of the clamp for circumferential positioning; S4, stamping blind hole: start the pressure driving part, insert the stamping head into the mold, extrude the striker to move to the inner wall of the shaft sleeve, after stamping is completed, the stamping head is withdrawn, and the springback device resets the striker.

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