CN114473586A

CN114473586A - Mandrel processing device

Info

Publication number: CN114473586A
Application number: CN202210112171.8A
Authority: CN
Inventors: 周倜; 陈震球; 丁荣峰; 陈烽; 樊雅庆
Original assignee: Jiangsu Baiornik Intelligent Technology Co ltd
Current assignee: Jiangsu Baiornik Intelligent Technology Co ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-05-13
Anticipated expiration: 2042-01-29
Also published as: CN114473586B

Abstract

The invention discloses a mandrel processing device which comprises a protection mechanism and a mandrel, wherein the protection mechanism comprises a supporting table, supporting legs arranged at the bottom end of the supporting table and a shell arranged on the upper end surface of the supporting table, and one side of the shell is provided with an opening; the clamping and rotating mechanism comprises a rotating disc arranged on one side inside the shell, a plurality of clamping assemblies matched with the rotating disc and a rotating assembly arranged outside the shell, and the rotating assembly is fixedly connected with the center of the back face of the rotating disc through a rotating shaft; the cutting mechanism comprises a first hydraulic rod arranged in the middle of the top end of the shell, a reciprocating assembly arranged at the bottom end of the first hydraulic rod, and a cutting piece matched with the reciprocating assembly; the invention thoroughly removes the fatigue layer and the crack defects on the surface of the core rod by the cutting mechanism through reciprocating cutting, and is suitable for the core rods with different lengths and different diameters.

Description

Mandrel processing device

Technical Field

The invention relates to the technical field of core rod processing, in particular to a core rod processing device.

Background

The mandrel is an important tool for producing seamless steel tubes, plays a role in supporting the deformation of the steel tubes in the production process, directly determines the production efficiency, the surface quality and the production cost of enterprises due to the quality of the mandrel, has severe working conditions in the production of the seamless steel tubes, and can generate a large amount of cracks and abrasion after being used for a long time, so that the mandrel needs to be repaired, and when the mandrel is repaired, a fatigue layer and crack defects on the surface of the mandrel need to be thoroughly removed through peeling cutting so as to carry out the repair work; however, the mandrel machining equipment in the current market is poor in applicability and cannot be applied to mandrels with various lengths and diameters, and therefore a mandrel machining device is provided.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the problems of the conventional mandrel bar machining apparatus.

Therefore, the problem to be solved by the present invention is how to solve the problem of poor applicability of the mandrel bar machining apparatus.

In order to solve the technical problems, the invention provides the following technical scheme: a mandrel processing device comprises a protection mechanism and a mandrel processing mechanism, wherein the protection mechanism comprises a supporting table, supporting legs arranged at the bottom end of the supporting table and a shell arranged on the upper end surface of the supporting table, and an opening is formed in one side of the shell; the clamping and rotating mechanism comprises a rotating disc arranged on one side inside the shell, a plurality of clamping assemblies matched with the rotating disc and a rotating assembly arranged outside the shell, and the rotating assembly is fixedly connected with the center of the back face of the rotating disc through a rotating shaft; and the cutting mechanism comprises a first hydraulic rod arranged in the middle of the top end of the shell, a reciprocating assembly arranged at the bottom end of the first hydraulic rod, and a cutting piece matched with the reciprocating assembly.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: circular recess has been seted up to the rolling disc terminal surface, the centre gripping subassembly include the second hydraulic stem, and set up in the arc of second hydraulic stem bottom, a plurality of centre gripping subassembly circumference set up in the inner wall of circular recess.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: the shell is provided with a first bearing seat at a position corresponding to the rotating disc, the rotating shaft is fixed in an inner ring of the first bearing seat, the rotating assembly comprises a first gear fixedly connected with the rotating shaft and a servo motor arranged on the supporting table, the output end of the servo motor is connected with a second gear, and the second gear is meshed with the first gear.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: reciprocating assembly including set up in the roof of first hydraulic stem bottom, set up in fixed block and the sliding block of roof bottom one side, and set up in first division board and the second division board of roof bottom opposite side, first division board with form the gauge between the second division board, first division board with the one end of second division board is provided with the third division board.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: the fixed block with the sliding block sets up relatively, the opening orientation has been seted up at the sliding block middle part the circular through-hole of fixed block, the joint groove has been seted up on circular through-hole top, it is provided with the secondary shaft bearing to slide in the circular through-hole, the top of secondary shaft bearing is provided with the joint piece, the joint piece slip joint in the joint groove, first division board with the second division board with first through-hole and second through-hole have been seted up respectively to the corresponding position department of secondary shaft bearing.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: a threaded rod is fixed in the second bearing block, a first clamping pipe is arranged at the other end of the threaded rod, first clamping teeth are circumferentially arranged on two sides of the first clamping pipe, the first clamping pipe penetrates through the first through hole of the first isolation plate, second clamping connection pipes are respectively sleeved in the first through holes and the second through holes, second clamping connection teeth are arranged at one end of each second clamping connection pipe in the circumferential direction, a first bevel gear is arranged on the pipe body of the second clamping pipe positioned at one side of the second clamping teeth, the two second clamping pipes are oppositely arranged, the first clamping teeth of the first clamping pipe are meshed with the second clamping teeth of one of the two second clamping pipes, and a rotating motor is arranged on one side of the third isolating plate, the output end of the rotating motor penetrates through the third isolating plate and is in transmission connection with a second bevel gear, and the second bevel gear is meshed with the first bevel gears on the two second clamping pipes.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: the second bearing seat is provided with a clamping seat facing one side of the fixed block, a cavity is formed in the clamping seat, a clamping rod is inserted in the clamping seat in a sliding mode, an elastic spring is arranged between the clamping rod and the bottom wall of the clamping seat, two sliding grooves are formed in the fixed block facing one side of the sliding block at equal intervals, and one end of the clamping rod abuts against one of the two sliding grooves.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: the fixed block with the fixed slide bar that is provided with between the first division board, sliding connection has two regulating blocks, two on the slide bar a terminal surface that the regulating block is relative is provided with first spring, first spring cup joint in the slide bar, the spacing groove has been seted up on the slide bar, the regulating block with the corresponding position of spacing groove seted up with the screw hole that the spacing groove is linked together, screw hole female connection has the screw, two be provided with between the regulating block and slide the seat, slide the seat cup joint in the slide bar, the threaded rod with the position threaded connection that slides the seat and correspond has the removal seat, slide the seat with it is provided with the connecting plate to remove between the seat.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: the cutting piece is arranged at the bottom end of the connecting plate and comprises a supporting rod and a cutting head arranged at one end of the supporting rod.

As a preferable aspect of the mandrel bar processing apparatus of the present invention, wherein: be provided with the third bearing frame on the connecting plate, fixedly connected with dwang in the third bearing frame, dwang one end is provided with a plurality of flabellum, the dwang other end is connected with slewing gear, the slide bar top is provided with the pinion rack, both ends respectively through the second spring about the pinion rack with the fixed block with first division board is connected, the pinion rack with slewing gear meshes mutually.

The invention has the beneficial effects that: the mandrel is clamped by the clamping and rotating mechanism, the distance between the cutting piece and the mandrel is adjusted by the first hydraulic rod in the cutting mechanism, and the fatigue layer and the crack defects on the surface of the mandrel are thoroughly eliminated by the reciprocating assembly through reciprocating cutting, so that the mandrel cutting machine is suitable for mandrels with different lengths and different diameters.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. Wherein:

fig. 1 is a schematic view of a mandrel bar machining apparatus.

Fig. 2 is an internal configuration diagram of the mandrel bar machining apparatus.

Fig. 3 is a structural view of a clamping and rotating mechanism of the mandrel bar machining apparatus.

Fig. 4 is a structural diagram of a cutting mechanism of the mandrel bar machining apparatus.

Fig. 5 is a hair growth diagram at a in fig. 4.

Fig. 6 is another perspective view of the cutting mechanism in the mandrel bar processing apparatus.

Fig. 7 is a side view of a cutting mechanism in the mandrel machining apparatus.

Fig. 8 is a structural view of the connection between the chuck base and the chuck rod in the mandrel machining apparatus.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 4 and fig. 7, a first embodiment of the present invention provides a mandrel processing apparatus, which includes a protection mechanism 100, a clamping and rotating mechanism 200, and a cutting mechanism 300, wherein the clamping and rotating mechanism 200 clamps a mandrel, and the cutting mechanism 300 completely removes a fatigue layer and a crack defect on the surface of the mandrel by reciprocating cutting, and is applicable to mandrels with different lengths and different diameters.

Specifically, the protection mechanism 100 comprises a support table 101, support legs 102 arranged at the bottom end of the support table 101, and a shell 103 arranged on the upper end face of the support table 101, wherein an opening 103a is formed in one side of the shell 103; the core rod enters the housing 103 from the opening 103 a.

Preferably, the clamping and rotating mechanism 200 comprises a rotating disc 201 arranged on one side inside the housing 103, a plurality of clamping assemblies 202 matched with the rotating disc 201, and a rotating assembly 203 arranged outside the housing 103, wherein the rotating assembly 203 is fixedly connected with the center of the back surface of the rotating disc 201 through a rotating shaft 204; the core rod is clamped by a plurality of clamping components 202 after approaching the rotating disc 201, and the rotating component 203 drives the rotating disc 201 to rotate through the rotating shaft 204, so that the core rod is driven to rotate.

Preferably, the cutting mechanism 300 comprises a first hydraulic rod 301 disposed at the middle of the top end of the housing 103, a reciprocating assembly 302 disposed at the bottom end of the first hydraulic rod 301, and a cutting member 303 engaged with the reciprocating assembly 302; the first hydraulic rod 301 adjusts the distance between the cutting piece 303 and the surface of the core rod, and under the coordination of the reciprocating assembly 302, the fatigue layer and the crack defects on the surface of the core rod are thoroughly removed by the cutting piece 303 through reciprocating cutting when the core rod rotates.

Preferably, a circular groove 201a is formed in the end face of the rotating disc 201, the clamping assemblies 202 comprise second hydraulic rods 202a and arc-shaped plates 202b arranged at the bottom ends of the second hydraulic rods 202a, and the plurality of clamping assemblies 202 are circumferentially arranged on the inner wall of the circular groove 201 a; when the core rod extends into the circular groove 201a, the second hydraulic rod 202a is adjusted to enable the arc-shaped plate 202b to firmly abut against one end of the core rod, and the core rod is clamped under the action of the plurality of clamping assemblies 202.

Preferably, a first bearing seat 205 is arranged at a position of the housing 103 corresponding to the rotating disc 201, the rotating shaft 204 is fixed in an inner ring of the first bearing seat 205, the rotating assembly 203 comprises a first gear 203a fixedly connected with the rotating shaft 204, and a servo motor 203b arranged on the supporting table 101, an output end of the servo motor 203b is connected with a second gear 203c, and the second gear 203c is meshed with the first gear 203 a; the servo motor 203b is turned on, the servo motor 203b drives the second gear 203c to rotate, the second gear 203c drives the first gear 203a to rotate, and the first gear 203a drives the rotating disc 201 to rotate through the rotating shaft 204.

When the mandrel cutting device is used, when a mandrel enters the shell 103 from the opening 103a and extends into the circular groove 201a, the second hydraulic rod 202a is adjusted to enable the arc-shaped plate 202b to firmly abut against one end of the mandrel, the mandrel is clamped under the action of the plurality of clamping assemblies 202, the servo motor 203b is started, the servo motor 203b drives the second gear 203c to rotate, the second gear 203c drives the first gear 203a to rotate, the first gear 203a drives the rotating disc 201 to rotate through the rotating shaft 204, so that the mandrel starts to rotate, the first hydraulic rod 301 is adjusted to enable the cutting piece 303 to move to the proper distance of the surface of the mandrel, and under the cooperation of the reciprocating assemblies 302, the cutting piece 303 thoroughly removes fatigue layers and crack defects on the surface of the mandrel through reciprocating cutting.

Example 2

Referring to fig. 1 to 8, a second embodiment of the present invention is based on the above embodiment.

Specifically, the reciprocating assembly 302 includes a top plate 302a disposed at the bottom end of the first hydraulic rod 301, a fixed block 302b and a sliding block 302c disposed at one side of the bottom end of the top plate 302a, and a first isolation plate 302d and a second isolation plate 302e disposed at the other side of the bottom end of the top plate 302a, wherein a space is formed between the first isolation plate 302d and the second isolation plate 302e, and a third isolation plate 302f is disposed at one end of the first isolation plate 302d and one end of the second isolation plate 302 e.

Preferably, the fixed block 302b and the sliding block 302c are arranged oppositely, the middle part of the sliding block 302c is provided with a circular through hole 302c-1 with an opening facing the fixed block 302b, the top end of the circular through hole 302c-1 is provided with a clamping groove 302c-2, a second bearing seat 302g is arranged in the circular through hole 302c-1 in a sliding manner, the top end of the second bearing seat 302g is provided with a clamping block 302g-1, the clamping block 302g-1 is clamped in the clamping groove 302c-2 in a sliding manner, and the first through hole and the second through hole are respectively arranged at the positions of the first isolation plate 302d and the second isolation plate 302e corresponding to the second bearing seat 302 g; as the clamping block 302g-1 at the top end of the second bearing seat 302g is clamped in the clamping groove 302c-2, the second bearing seat 302g cannot rotate in the circular through hole 302c-1 and can only move.

Preferably, a threaded rod 302h is fixed in the second bearing seat 302g, a first clamping connection pipe 302h-1 is arranged at the other end of the threaded rod 302h, first clamping teeth 302h-2 are circumferentially arranged at two sides of the first clamping connection pipe 302h-1, the first clamping connection pipe 302h-1 penetrates through a first through hole of the first isolation plate 302d, a second clamping connection pipe 302i is sleeved in the first through hole and a second through hole respectively, a second clamping connection tooth 302i-1 is circumferentially arranged at one end of the second clamping connection pipe 302i, a first bevel gear 302i-2 is arranged on a pipe body of the second clamping connection pipe 302i-1, the two second clamping connection pipes 302i are oppositely arranged, the first clamping tooth 302h-2 of the first clamping connection pipe 302h-1 is meshed with the second clamping connection tooth 302i-1 of one of the two second clamping connection pipes 302i, a rotating motor 302j is arranged on one side of the third isolation plate 302f, the output end of the rotating motor 302j penetrates through the third isolation plate 302f to be in transmission connection with a second bevel gear 302k, and the second bevel gear 302k is meshed with first bevel gears 302i-2 on the two second clamping connection pipes 302 i; after the rotating motor 302j is started, the rotating motor 302j drives the second bevel gear 302k to rotate, the second bevel gear 302k is meshed with the first bevel gears 302i-2 on the two second clamping tubes 302i, so that the two second clamping tubes 302i rotate in opposite directions, and the first clamping teeth 302h-1 of the first clamping tube 302h-1 are meshed with the second clamping teeth 302i-1 of one of the two second clamping tubes 302i, so that the first clamping tube 302h-1 and one of the two second clamping tubes 302i rotate together.

Preferably, one side of the second bearing seat 302g, which faces the fixed block 302b, is provided with a clamping seat 302g-2, a cavity is formed in the clamping seat 302g-2, a clamping rod 302g-3 is inserted in the clamping seat 302g-2 in a sliding manner, an elastic spring 302g-4 is arranged between the clamping rod 302g-3 and the bottom wall of the clamping seat 302g-2, one side of the fixed block 302b, which faces the sliding block 302c, is provided with two sliding grooves 302b-1 at equal intervals, and one end of the clamping rod 302g-3 abuts against one of the two sliding grooves 302 b-1; the catching bar 302g-3 catches one of the two sliding grooves 302b-1, and when the second bearing housing 302g moves in the circular through hole 302c-1, the catching bar 302g-3 is transferred from one of the two sliding grooves 302b-1 to the other.

Preferably, a sliding rod 302l is fixedly arranged between the fixed block 302b and the first isolation plate 302d, the sliding rod 302l is connected with two adjusting blocks 302m in a sliding manner, one end face of each of the two adjusting blocks 302m, which is opposite to the other end face, is provided with a first spring 302m-1, the first spring 302m-1 is sleeved on the sliding rod 302l, the sliding rod 302l is provided with a limiting groove 302l-1, the adjusting block 302m is provided with a threaded hole 302m-2 communicated with the limiting groove 302l-1 at a position corresponding to the limiting groove 302l-1, the threaded hole 302m-2 is in threaded connection with a screw 302m-3, a sliding seat 302n is arranged between the two adjusting blocks 302m, the sliding seat 302n is sleeved on the sliding rod 302l, the threaded rod 302h is in threaded connection with a moving seat 302h-3 at a position corresponding to the sliding seat 302n, and a connecting plate 302p is arranged between the sliding seat 302n and the moving seat 302 h-3; the distance between the two adjusting blocks 302m can be adjusted according to the length of the core rod to be subjected to surface treatment, and after the distance between the two adjusting blocks 302m is determined, the screw 302m-3 is screwed tightly, so that the screw 302m-3 is tightly abutted to the limiting groove 302 l-1.

Preferably, the bottom end of the connecting plate 302p is provided with a cutting member 303, the cutting member 303 comprises a supporting rod 303a, and a cutting head 303b arranged at one end of the supporting rod 303 a; the surface of the core rod is treated by the cutting head 303 b.

Preferably, a third bearing seat 302p-1 is arranged on the connecting plate 302p, a rotating rod 302q is fixedly connected in the third bearing seat 302p-1, one end of the rotating rod 302q is provided with a plurality of fan blades 302q-1, the other end of the rotating rod 302q is connected with a rotating gear 302q-2, a toothed plate 302q-3 is arranged at the bottom end of the sliding rod 302l, the left end and the right end of the toothed plate 302q-3 are respectively connected with a fixed block 302b and a first isolating plate 302d through a second spring 302q-4, and the toothed plate 302q-3 is meshed with the rotating gear 302 q-2; when the threaded rod is driven to rotate by one of the two second clamping tubes 302i, the connecting plate 302p is driven to move due to the connecting plate 302p arranged between the sliding seat 302n and the moving seat 302h-3, and when the connecting plate 302p moves, the rotating gear 302q-2 is meshed with the toothed plate 302q-3, so that the rotating gear 302q-2 starts to rotate and drives the fan blades 302q-1 to rotate, and the air flow blown by the fan blades 302q-1 can blow away the debris on the surface of the mandrel.

When the device is used, a core rod enters the shell 103 from the opening 103a and extends into the circular groove 201a, the second hydraulic rod 202a is adjusted, the arc-shaped plate 202b is firmly abutted against one end of the core rod, the core rod is clamped under the action of the plurality of clamping assemblies 202, the servo motor 203b is started, the servo motor 203b drives the second gear 203c to rotate, the second gear 203c drives the first gear 203a to rotate, the first gear 203a drives the rotating disc 201 to rotate through the rotating shaft 204, so that the core rod starts to rotate, the first hydraulic rod 301 is adjusted to enable the cutting piece 303 to move to the proper distance of the surface of the core rod, the distance between the two adjusting blocks 302m can be adjusted according to the length of the core rod needing surface treatment, after the distance between the two adjusting blocks 302m is determined, the screw 302m-3 is screwed, so that the screw 302m-3 abuts against the tight limiting groove 302l-1, after the rotating motor 302j is started, the rotating motor 302j drives the second bevel gear 302k to rotate, because the second bevel gear 302k is meshed with the first bevel gears 302i-2 on the two second clamping tubes 302i, the two second clamping tubes 302i rotate in the opposite directions, because the first clamping tooth 302h-2 of the first clamping tube 302h-1 is meshed with the second clamping tooth 302i-1 of one of the two second clamping tubes 302i, the first clamping tube 302h-1 rotates with one of the two second clamping tubes 302i, the first clamping tube 302h-1 drives the threaded rod 302h to rotate, because the connecting plate 302p is arranged between the sliding seat 302n and the moving seat 302h-3, the connecting plate 302p starts to move under the driving of the screw rod principle, when the first spring 302m-1 of one adjusting block 302m is moved to be close to and slowly pressed, under the elastic force of the first spring 302m-1, the whole threaded rod 302h moves, the threaded rod 302h drives the second bearing seat 302g to move in the circular through hole 302c-1, so that the clamping rod 302g-3 is transferred from one of the two sliding grooves 302b-1 to the other, at which time the first bayonet tube 302h-1 engages the other of the two second bayonet tubes 302i and begins to rotate in the opposite direction, thereby driving the threaded rod 302h to rotate reversely, causing the connecting plate 302p to move reversely, during the back and forth movement of the coupling plate 302p, the cutting head 303b treats the surface of the core rod, and since the rotary gear 302q-2 is engaged with the tooth plate 302q-3, therefore, the rotating gear 302q-2 starts to rotate and drives the plurality of fan blades 302q-1 to rotate, and the air flow blown by the plurality of fan blades 302q-1 can blow away the debris on the surface of the core rod.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A mandrel processingequipment which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the protection mechanism (100) comprises a support platform (101), support legs (102) arranged at the bottom end of the support platform (101), and a shell (103) arranged on the upper end face of the support platform (101), wherein an opening (103a) is formed in one side of the shell (103);

the clamping and rotating mechanism (200) comprises a rotating disc (201) arranged on one side inside the shell (103), a plurality of clamping assemblies (202) matched with the rotating disc (201), and a rotating assembly (203) arranged outside the shell (103), wherein the rotating assembly (203) is fixedly connected with the center of the back face of the rotating disc (201) through a rotating shaft (204); and the number of the first and second groups,

the cutting mechanism (300) comprises a first hydraulic rod (301) arranged in the middle of the top end of the shell (103), a reciprocating assembly (302) arranged at the bottom end of the first hydraulic rod (301), and a cutting piece (303) matched with the reciprocating assembly (302).

2. The mandrel machining apparatus according to claim 1, wherein: circular recess (201a) have been seted up to rolling disc (201) terminal surface, centre gripping subassembly (202) include second hydraulic stem (202a), and set up in arc (202b) of second hydraulic stem (202a) bottom, a plurality of centre gripping subassembly (202) circumference set up in the inner wall of circular recess (201 a).

3. The mandrel machining apparatus according to claim 2, wherein: the shell (103) is provided with a first bearing seat (205) at a position corresponding to the rotating disc (201), the rotating shaft (204) is fixed in an inner ring of the first bearing seat (205), the rotating assembly (203) comprises a first gear (203a) fixedly connected with the rotating shaft (204) and a servo motor (203b) arranged on the supporting table (101), the output end of the servo motor (203b) is connected with a second gear (203c), and the second gear (203c) is meshed with the first gear (203 a).

4. The mandrel machining apparatus according to claim 1 or 3, wherein: the reciprocating assembly (302) comprises a top plate (302a) arranged at the bottom end of the first hydraulic rod (301), a fixed block (302b) and a sliding block (302c) arranged on one side of the bottom end of the top plate (302a), a first isolation plate (302d) and a second isolation plate (302e) arranged on the other side of the bottom end of the top plate (302a), a distance is formed between the first isolation plate (302d) and the second isolation plate (302e), and a third isolation plate (302f) is arranged at one end of the first isolation plate (302d) and one end of the second isolation plate (302 e).

5. The mandrel machining apparatus according to claim 4, wherein: the fixed block (302b) and the sliding block (302c) are arranged oppositely, a circular through hole (302c-1) with an opening facing the fixed block (302b) is formed in the middle of the sliding block (302c), a clamping groove (302c-2) is formed in the top end of the circular through hole (302c-1), a second bearing seat (302g) is arranged in the circular through hole (302c-1) in a sliding mode, a clamping block (302g-1) is arranged at the top end of the second bearing seat (302g), the clamping block (302g-1) is clamped in the clamping groove (302c-2) in a sliding mode, and a first through hole and a second through hole are formed in positions, corresponding to the second bearing seat (302g), of the first isolation plate (302d) and the second isolation plate (302e) respectively.

6. The mandrel machining apparatus according to claim 5, wherein: a threaded rod (302h) is fixed in the second bearing seat (302g), a first clamping connection pipe (302h-1) is arranged at the other end of the threaded rod (302h), first clamping connection teeth (302h-2) are circumferentially arranged on two sides of the first clamping connection pipe (302h-1), the first clamping connection pipe (302h-1) penetrates through a first through hole of the first isolation plate (302d), second clamping connection pipes (302i) are respectively sleeved in the first through hole and the second through hole, a second clamping connection tooth (302i-1) is circumferentially arranged at one end of each second clamping connection pipe (302i), a first bevel gear (302i-2) is arranged on a pipe body of each second clamping connection pipe (302i-1), and the two second clamping connection pipes (302i) are oppositely arranged, the first clamping teeth (302h-2) of the first clamping pipe (302h-1) are meshed with the second clamping teeth (302i-1) of one of the two second clamping pipes (302i), one side of the third isolation plate (302f) is provided with a rotating motor (302j), the output end of the rotating motor (302j) penetrates through the third isolation plate (302f) to be in transmission connection with a second bevel gear (302k), and the second bevel gear (302k) is meshed with the first bevel gears (302i-2) on the two second clamping pipes (302 i).

7. The mandrel machining apparatus according to claim 6, wherein: one side, facing the fixed block (302b), of the second bearing seat (302g) is provided with a clamping seat (302g-2), a cavity is formed in the clamping seat (302g-2), a clamping rod (302g-3) is inserted in the clamping seat (302g-2) in a sliding mode, an elastic spring (302g-4) is arranged between the clamping rod (302g-3) and the bottom wall of the clamping seat (302g-2), two sliding grooves (302b-1) are formed in one side, facing the sliding block (302c), of the fixed block (302b) at equal intervals, and one end of the clamping rod (302g-3) abuts against one of the two sliding grooves (302 b-1).

8. The mandrel machining apparatus according to claim 7, wherein: a sliding rod (302l) is fixedly arranged between the fixing block (302b) and the first isolation plate (302d), the sliding rod (302l) is connected with two adjusting blocks (302m) in a sliding manner, one end face of each adjusting block (302m) is provided with a first spring (302m-1), the first spring (302m-1) is sleeved on the sliding rod (302l), a limiting groove (302l-1) is formed in the sliding rod (302l), a threaded hole (302m-2) communicated with the limiting groove (302l-1) is formed in the position, corresponding to the limiting groove (302l-1), of each adjusting block (302m), a screw (302m-3) is connected to the threaded hole (302m-2) in a threaded manner, a sliding seat (302n) is arranged between the two adjusting blocks (302m), the sliding seat (302n) is sleeved on the sliding rod (302l), a moving seat (302h-3) is in threaded connection with the threaded rod (302h) and the position corresponding to the sliding seat (302n), and a connecting plate (302p) is arranged between the sliding seat (302n) and the moving seat (302 h-3).

9. The mandrel machining apparatus according to claim 8, wherein: the bottom end of the connecting plate (302p) is provided with a cutting piece (303), and the cutting piece (303) comprises a supporting rod (303a) and a cutting head (303b) arranged at one end of the supporting rod (303 a).

10. The mandrel machining apparatus according to claim 8 or 9, wherein: be provided with third bearing frame (302p-1) on connecting plate (302p), fixedly connected with dwang (302q) in third bearing frame (302p-1), dwang (302q) one end is provided with a plurality of flabellum (302q-1), dwang (302q) other end is connected with slewing gear (302q-2), slide bar (302l) top is provided with pinion rack (302q-3), both ends respectively through second spring (302q-4) about pinion rack (302q-3) with fixed block (302b) with first division board (302d) are connected, pinion rack (302q-3) with slewing gear (302q-2) mesh mutually.