An intermediate shaft sleeve drawing-cold heading integrated forming device and process thereof

Abstract

The present application relates to the technical field of cold heading and drawing integrated forming, and specifically discloses an intermediate shaft sleeve drawing and cold heading integrated forming device and its process, which includes a first cold heading mechanism, a drawing mechanism and a second cold heading mechanism, the drawing mechanism includes a bed, a drawing trolley movably arranged on the bed, a die base fixed to the bed, and a feeding clamp movably arranged on the bed, the bed is provided with an oil spray pipe between the feeding clamp and the die base, the bed is provided with a bracket on the side of the oil spray pipe away from the die base, a scraper frame is provided on the bracket, the inner wall of the scraper frame is fitted with the outer wall of the hinged part, a plurality of scrapers are hinged on the side of the scraper frame away from the feeding clamp, and a first elastic member is also provided between the scraper and the scraper frame, and when the scraper is fitted with the sleeve part, the first elastic member is in a stretched state. The present application has the effect of timely removing oil stains on the blank.

Description

Technical Field

[0001] The present application relates to the technical field of cold heading-drawing integrated forming, and in particular to an intermediate shaft sleeve drawing-cold heading integrated forming device and a process thereof. Background Art

[0002] Drawing generally refers to cold drawing. Cold drawing is to forcibly stretch the steel bar under room temperature conditions with a tensile stress exceeding the original yield point strength of the steel bar, so as to cause the steel bar to produce plastic deformation in order to achieve the purpose of increasing the yield point strength of the steel bar and saving steel. The cold heading process is one of the new processes of metal pressure processing with little cutting. It is a processing method that utilizes the plastic deformation of metal under the action of external force, and with the help of a mold, redistributes and transfers the metal volume to form the required parts or blanks.

[0003] As shown in Figure (1), the sleeve is divided into a U-shaped hinge part, a sleeve part and a spline tooth part in the sleeve part. The production process is to cold-forge the blank to form it into a U-shaped hinge part, and at the same time draw another part of the blank to form it into a cylindrical shape, and further cold-forge the cylindrical blank to form it into a sleeve part, and then weld the hinge part and the sleeve part, and finally perform milling operation on the two ears of the hinge part to generate perforations at the two ears of the hinge part, thus completing the processing of the sleeve.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: drawing oil is required when drawing the blank, and cold heading oil is required when the drawn cylindrical blank is further cold headed into a sleeve portion. However, cold heading oil and drawing oil cannot be mixed due to their different lubricating properties, especially drawing oil requires higher lubricity. Therefore, the blank needs to be degreased after each step. The existing treatment method is to collect the blanks after cold heading and drawing, and then degrease them uniformly. However, collection and storage require extra time. At this time, the oil on the blank is easy to condense into sludge and oil stains, which increases the cost and process of subsequent degreasing. Summary of the invention

[0005] In order to improve the problem of complicated front and rear oil removal process in the drawing operation, the present application provides an intermediate shaft sleeve drawing-cold heading integrated forming device and process thereof.

[0006] The present application provides an intermediate shaft sleeve drawing-cold heading integrated forming device and process thereof adopts the following technical solutions:

[0007] An intermediate shaft sleeve drawing-cold heading integrated forming device and process thereof, comprising a first cold heading mechanism, a drawing mechanism and a second cold heading mechanism, wherein the drawing mechanism comprises a bed, a drawing trolley movably arranged on the bed, a die base fixedly connected to the bed and a feeding clamp movably arranged on the bed, wherein the feeding clamp and the drawing trolley are arranged on both sides of the die base, and an oil injection pipe is arranged on the bed between the feeding clamp and the die base, wherein the drawing mechanism is located between the first cold heading mechanism and the second cold heading mechanism. Between the mechanisms, a bracket is provided on the side of the bed located at the oil injection pipe away from the mold base, a scraper frame is provided on the bracket, the inner wall of the scraper frame is in contact with the outer wall of the hinged part, and a plurality of scrapers are hinged on the side of the scraper frame away from the feeding clamp. When all the scrapers are folded together, the scrapers are surrounded into a trumpet shape, and the trumpet-shaped small mouth of the scraper is plugged and matched with the sleeve part. A first elastic member is also provided between the scraper and the scraper frame. When the scraper is in contact with the sleeve part, the first elastic member is in a stretched state.

[0008] By adopting the above technical scheme, after the blank is cold-forged by the first cold-forging mechanism, a clamping portion and a U-shaped hinged portion are formed for easy clamping of the cold-forging trolley. After the blank is transported to the feeding clamp, the feeding clamp clamps the hinged portion of the blank, and then the feeding clamp moves in the direction close to the die base. At this time, the blank passes through the scraping frame, so that the scraping frame scrapes off the cold-forging oil remaining on the blank, and the sponge ring is also stretched and pressed against the blank to further absorb the oil stains remaining on the blank. The oil spray pipe sprays drawing oil on the scraped portion of the blank, and the drawing trolley clamps the clamping portion of the blank for drawing. After the drawing is completed, the drawing trolley releases the blank, and the feeding clamp pulls the blank to move away from the drawing trolley. At this time, since the blank has been formed with a sleeve portion with a reduced size, the scraping frame cannot scrape off the drawing oil of the sleeve portion, and the scraper approaches the direction of the blank through the action of the first elastic member, so that the scraper is pressed against the blank. The drawing oil on the blank is scraped off by the scraper, and the sponge ring also shrinks with the scraper to be tightly pressed against the sleeve part of the blank to absorb the oil stains remaining on the blank after the scraper is cleaned, that is, the scraper frame and sponge ring clean the cold heading oil on the blank before drawing, and the scraper and sponge ring clean the drawing oil after drawing; the oil removal is more timely and the cleaning effect is better, and no additional manual oil removal is required. The degreasing agent in the cavity flows to the sponge ring through the transmission hole, thereby improving the effect of the sponge ring in absorbing oil stains, and the entire oil removal process does not need to take up extra time, effectively reducing the cost of the oil removal operation; after the drawing oil is removed, the second automatic clamp clamps the blank and continues to move it to the second cold heading mechanism for cold heading operation until the final cold heading is produced. The entire sleeve processing technology is one-piece molding and does not require welding, so the material utilization rate is high, and the products after cold heading and drawing have better mechanical properties, smoother surface and higher precision.

[0009] Optionally, the inner wall of the scraper is fixedly connected to a first fixed cylinder at the transmission hole, the outer wall of the first fixed cylinder away from the transmission hole is fixedly connected to a second fixed cylinder, a valve plate is slidably connected in the second fixed cylinder, and the diameter of the cross-section of the valve plate is larger than the inner cylinder diameter of the first fixed cylinder and smaller than the inner cylinder diameter of the second fixed cylinder, and a control component for controlling the movement of the valve plate is provided on the scraper.

[0010] By adopting the above technical scheme, when the sponge ring is in the cleaning operation, the control component controls the movement of the valve plate to leave a gap between the valve plate and the end wall of the first fixed cylinder, that is, the degreasing agent flows from the gap between the valve plate and the first fixed cylinder to the transmission hole, and flows through the transmission hole to the sponge ring, so as to continuously supply the sponge ring with the degreasing agent, and because there is more degreasing agent and greater pressure in the scraper, the degreasing agent and oil stain mixture in the sponge ring is difficult to reversely penetrate into the scraper; and when the sponge ring is not in contact with the blank, the control component controls the valve plate to move toward the first fixed cylinder until the valve plate is in contact with the first fixed cylinder, that is, stops supplying the degreasing agent to the sponge ring, and effectively avoids the waste of the degreasing agent.

[0011] Optionally, the control component includes a first connecting rod hinged through and connected to the side wall of the scraper away from the sponge ring, a roller rotatably arranged at the end of the first connecting rod away from the valve plate, a turntable rotatably arranged in the scraper, and a second connecting rod hinged to the side of the valve plate away from the transmission hole, and the ends of the first connecting rod and the second connecting rod are hinged to the turntable, the distance from the intersection axis of the hinge between the first connecting rod and the turntable to the blank is smaller than the distance from the second connecting rod to the blank, and a second elastic member is arranged between the first connecting rod and the scraper for moving the first connecting rod closer to the blank.

[0012] By adopting the above technical solution, when the feeding clamp moves the blank toward the drawing trolley, the blank pushes the roller to rotate the first connecting rod. At this time, the turntable rotates and drives the second connecting rod to move, so that the second connecting rod pulls the valve plate, and then the degreasing agent in the accommodating cavity flows smoothly to the sponge ring; the above state continues until the blank is separated from the roller and abuts against it. At this time, the rollers are close to each other under the action of the second elastic member, and the first connecting rod rotates, causing the turntable to rotate as well. The turntable pushes the second connecting rod. At this time, the second connecting rod pushes the valve plate to move toward the sponge ring, that is, the degreasing agent in the accommodating cavity is blocked by the valve plate and cannot flow to the sponge ring. The structure is relatively simple, the stability is high, the cost is low, and no additional energy control is required.

[0013] Optionally, an elastic bag containing a cold heading oil detection agent is provided on the side of the scraper away from the scraper frame, the roller blocks the opening of the elastic bag, a buffer cloth is also provided at the opening of the elastic bag, and the buffer cloth is in contact with the roller.

[0014] By adopting the above technical solution, the reagent is injected into the elastic bag. When the roller rolls on the blank, it is in an expanded state, so that the reagent in the elastic bag is pressurized and flows toward the roller. In this process, the buffer cloth delays the flow rate of the reagent. After the reagent adheres to the peripheral wall of the roller, the roller transfers the reagent to the blank. When there is still oil stain on the part of the blank that needs to be degreased due to reasons such as the sponge being too dirty, the reagent reacts with the oil stain and changes color to remind the staff that the sponge ring needs to be replaced or cleaned.

[0015] Optionally, a baffle is provided on the scraper, a push-pull rod is fixedly connected to one side of the valve plate close to the sponge ring, an extrusion net is fixedly connected to one end of the push-pull rod away from the valve plate, and the baffle and the extrusion net are arranged on both sides of the sponge ring.

[0016] By adopting the above technical solution, when the first connecting rod moves to move the valve plate, the moving valve plate also drives the push-pull rod to move, and then the extrusion net also moves accordingly. When the roller does not abut against the blank, the valve plate moves in the direction close to the sponge ring, and the extrusion net also moves in the direction close to the sponge ring. At the same time, due to the obstruction of the baffle, the sponge ring is squeezed by the extrusion plate. At this time, the mixture of degreaser and oil stains in the sponge ring is squeezed out of the sponge ring, and the valve plate is closed, and the degreaser in the scraper cannot flow out; when the blank opens the roller, the valve plate moves in the direction away from the sponge ring, and the extrusion net also moves in the direction away from the sponge ring, that is, the degreaser in the scraper flows smoothly into the sponge ring, and the sponge ring is not squeezed, thereby completing the cleaning of the sponge ring.

[0017] Optionally, the scraper frame is slidably connected to the bracket, and a third elastic member connected to the scraper frame is provided on the bracket. The third elastic member is always in a stretched state, and the friction force between the scraper and the blank is always smaller than the pulling force exerted on the scraper frame by the third elastic member.

[0018] By adopting the above technical scheme, when the blank enters the scraper frame, since the pulling force of the third elastic member is greater than the friction force between the blank and the scraper frame, the scraper frame is fixed by the third elastic member and cannot move, while the blank continues to move. At this time, the scraper frame and the blank are in a relative displacement state, that is, the scraper frame scrapes off the cold heading on the surface of the blank; when the feeding clamp continues to push the blank to move until the feeding clamp and the scraper frame are against each other, the thrust of the feeding clamp is much greater than the pulling force of the third elastic member, so that the scraper frame is pushed by the feeding clamp. At this time, the scraper frame and the blank are in a relatively static state. After the blank is drawn and formed, the feeding clamp pulls the blank away from the drawing trolley. At this time, the scraper frame is subjected to the pulling force of the third elastic member and moves synchronously until the scraper frame moves to the initial position, and the scraper frame is stationary, thereby increasing the moving stroke of the blank during the entire process, so that the degreaser adhering to the blank can be fully volatilized to avoid subsequent interference with the spraying of the drawing oil.

[0019] Optionally, an elastic rope is tied to the bracket, the elastic rope is connected to the roller, and when the scraper moves to a position close to the mold base, the elastic rope pulls up the roller.

[0020] By adopting the above technical solution, when the scraper moves toward the die base, the tension of the elastic rope continues to increase until the scraper moves to a position close to the die base, and the elastic rope pulls up the roller to avoid the roller from occupying the position required for pulling part of the blank, thereby avoiding the roller from colliding with the die base.

[0021] A drawing-cold heading integrated forming process for an intermediate shaft sleeve comprises the following steps:

[0022] S1, preliminary cold heading of the blank, the blank undergoes cold heading operation by the first cold heading mechanism, so that one end of the blank is formed with a U-shaped hinged portion, and the other end is formed with a clamping portion that can pass through the die base and is convenient for the drawing trolley to clamp;

[0023] S2, feeding and removing cold heading oil, feeding the blank after cold heading in S1 to the feeding clamp and clamped by the feeding clamp, the feeding clamp clamps the blank and moves it in the direction close to the die base, at this time the blank passes through the scraping frame, the scraping frame is acted on by the third elastic member and does not move, the scraping frame first scrapes off most of the cold heading oil remaining on the blank, the sponge ring then removes the remaining small amount of cold heading oil on the blank, and at the same time the roller applies the cold heading agent to the blank portion that has been cleared, until the feeding clamp moves to abut against the scraping frame and pushes the scraping frame to move synchronously;

[0024] S3, drawing and forming, the feeding clamp pushes the blank through the die base, and the drawing trolley clamps and draws the blank to form a sleeve portion of the blank;

[0025] S4, drawing and withdrawing the material, the drawing trolley releases the blank, the feeding clamp clamps the hinged part and moves away from the die base until the scraper frame returns to the initial position, the scraper frame is stationary, and the blank continues to move. At this time, the scraper scrapes off most of the cold heading oil on the blank, and the sponge ring removes a small amount of cold heading oil remaining on the blank until the blank is completely separated from the scraper;

[0026] S5, cold forging to form a finished product. After the drawing operation is completed, the blank in S4 is clamped to the second cold forging mechanism for cold forging, and other details of the blank are further cold forged until it is formed into a final product.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The blank passes through the scraper frame, so that the scraper frame scrapes off the cold heading oil remaining on the blank, and the oil spray pipe sprays drawing oil on the scraped part of the blank. At this time, the drawing trolley clamps the clamping part of the blank to perform the drawing operation; after the drawing is completed, the drawing trolley releases the blank, and the feeding clamp pulls the blank away from the drawing trolley. At this time, since the blank has been formed with a sleeve part with a reduced size, the scraper frame cannot scrape off the drawing oil of the sleeve part. The scraper plate approaches the direction of the blank through the action of the first elastic member, so that the scraper plate is closely attached to the blank, so that the drawing oil on the blank is scraped off by the scraper plate, that is, the scraper frame removes the cold heading oil on the blank before drawing, and the scraper plate removes the drawing oil after drawing. The oil removal is more timely and the removal effect is better. No additional manual oil removal is required, and the entire oil removal process does not take up extra time, which effectively reduces the cost of the oil removal operation;

[0029] 2. When the feeding clamp moves the blank toward the drawing trolley, the blank pushes the roller, causing the second connecting rod to pull the valve plate, thereby causing the degreasing agent in the accommodating cavity to flow smoothly to the sponge ring. The above state continues until the blank is separated from the roller and abuts against the roller. At this time, the rollers are moved closer to each other under the action of the second elastic member, and the first connecting rod rotates, causing the turntable to rotate accordingly. The turntable pushes the second connecting rod, and at this time, the second connecting rod pushes the valve plate to move toward the sponge ring, that is, the degreasing agent in the accommodating cavity is blocked by the valve plate and cannot flow to the sponge ring. The structure is relatively simple.

[0030] 3. When the first connecting rod moves and the valve plate moves, the moving valve plate also drives the push-pull rod to move, and then the extrusion net moves accordingly. When the roller does not collide with the blank, the valve plate moves toward the direction close to the sponge ring, and the extrusion net also moves toward the direction close to the sponge ring. At the same time, due to the obstruction of the baffle, the sponge ring is squeezed by the extrusion plate. At this time, the mixture of degreaser and oil stains in the sponge ring is squeezed out of the sponge ring, and the valve plate is closed, and the degreaser in the scraper cannot flow out; when the blank opens the roller, the valve plate moves away from the sponge ring, and the extrusion net also moves away from the sponge ring. That is, the degreaser in the scraper flows smoothly into the sponge ring, and the sponge ring is not squeezed, so that the sponge ring continues to receive the degreaser. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the shaft sleeve body of the embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the overall structure of the blank after drawing in the embodiment of the present application;

[0033] Figure 3 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 4 It is a partial structural schematic diagram mainly used to show the pulling mechanism in the embodiment of the present application;

[0035] Figure 5 is along Figure 3 Schematic diagram of the cross-sectional structure along the AA line;

[0036] Figure 6 It is a partial structural schematic diagram of the embodiment of the present application, which is mainly used to display the scraper frame, scraper and the features connected to the scraper frame and scraper on the pulling mechanism.

[0037] : 1. first cold heading mechanism; 2. drawing mechanism; 21. bed; 211. bracket; 212. third elastic member; 213. elastic rope; 22. drawing trolley; 23. die base; 24. feeding clamp; 25. oil injection pipe; 3. second cold heading mechanism; 41. scraper frame; 42. scraper; 421. accommodating cavity; 422. transmission hole; 43. first elastic member; 44. sponge ring; 51. first fixed cylinder; 52. second fixed cylinder; 53. valve plate; 6. control assembly; 61. first connecting rod; 62. roller; 63. second connecting rod; 64. second elastic member; 71. elastic bag; 72. buffer cloth; 81. baffle; 82. push-pull rod; 83. extrusion net; 84. support rod; 91. sleeve portion; 92. hinge portion; 93 spline tooth portion. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-6 This application is described in further detail.

[0039] Embodiment 1

[0040] The embodiment of the present application discloses a drawing-cold heading integrated forming device for an intermediate shaft sleeve. Figure 2 , Figure 3 and Figure 4The intermediate shaft sleeve drawing-cold heading integrated forming device and its process include a first cold heading mechanism 1, a drawing mechanism 2 and a second cold heading mechanism 3. The first cold heading mechanism 1 is provided with a first automatic clamp (not shown in the figure), and the second cold heading mechanism 3 is provided with a second automatic clamp (not shown in the figure). When the blank is transported between the first cold heading mechanism 1, the drawing mechanism 2 and the second cold heading mechanism 3, it can be transported by the first automatic clamp and the second automatic clamp, or it can be transported manually. In the embodiment of the present application, the blank is transported by the first automatic clamp and the second automatic clamp. The drawing mechanism 2 includes a bed 21, a drawing trolley 22 movably arranged on the bed 21, a die base 23 fixedly connected to the bed 21 and a feeding clamp 24 movably arranged on the bed 21. The feeding clamp 24 and the drawing trolley 22 are arranged on both sides of the die base 23. An oil spray pipe 25 is arranged between the feeding clamp 24 and the die base 23, the drawing mechanism 2 is located between the first cold heading mechanism 1 and the second cold heading mechanism 3, the bed 21 is located on the side of the oil spray pipe 25 away from the die base 23 and is fixedly connected with a bracket 211, a scraper frame 41 is slidably connected to the bracket 211, the inner wall of the scraper frame 41 is in contact with the outer wall of the hinged portion 92, a plurality of scrapers 42 are hingedly connected to the side of the scraper frame 41 away from the feeding clamp 24, the scraper 42 can be four, and one is located at each of the four sides of the scraper frame 41, when all the scrapers 42 are folded, the scrapers 42 are surrounded into a trumpet shape, and the trumpet-shaped small mouth of the scraper 42 is plugged and matched with the sleeve portion 91, and a first elastic member 43 is also arranged between the scraper 42 and the scraper frame 41, when the scraper 42 is in contact with the blank, the first elastic member 43 is in a stretched state, and the first elastic member 43 is a tension spring.

[0041] After the blank is cold-forging by the first cold-forging mechanism 1, the first automatic clamp transports the blank to the feeding clamp 24, and then the feeding clamp 24 clamps the hinged portion 92 of the blank, and then the feeding clamp 24 moves in the direction close to the die base 23. At this time, the blank passes through the scraping frame 41, so that the scraping frame 41 scrapes off the cold-forging oil remaining on the blank, and the oil spray pipe 25 sprays drawing oil on the scraped portion of the blank. At this time, the drawing trolley 22 clamps the clamping portion of the blank for drawing. After the drawing is completed, the drawing trolley 22 releases the blank, and the feeding clamp 24 pulls the blank to move away from the drawing trolley 22. At this time, since the blank has been formed with a reduced-size sleeve portion 91, the scraping frame 41 cannot scrape it off The drawing oil of the sleeve portion 91, the scraper 42 is moved closer to the blank through the action of the first elastic member 43, so that the scraper 42 is tightly attached to the blank, so that the drawing oil on the blank is scraped off by the scraper 42, that is, the scraper frame 41 removes the cold heading oil on the blank before drawing, and the scraper 42 removes the drawing oil after drawing. The oil removal is more timely and the removal effect is better. No additional manual oil removal is required, and the entire oil removal process does not take up extra time, which effectively reduces the cost of the oil removal operation. After the drawing oil is removed, the second automatic clamp clamps the blank and continues to move it to the second cold heading mechanism 3 for cold heading operation until the finished product is finally cold headed. The entire sleeve processing technology is one-piece molding and does not require welding.

[0042] Reference Figure 5 and Figure 6 , a sponge ring 44 is commonly provided at the free end of all scrapers 42 and on one side close to the scraper frame 41. In the embodiment itself, the sponge ring 44 is fixed by a cable tie, and the cable tie is bonded to the wall of the scraper 42. The sponge ring 44 is a circle formed by a sponge strip. The inner diameter of the sponge ring 44 in a free state is smaller than the outer diameter of the sleeve portion 91. A receiving cavity 421 for receiving a degreasing agent is provided in the scraper 42, and a transmission hole 422 connected to the receiving cavity 421 is provided at the joint between the scraper 42 and the sponge ring 44. In the embodiment of the present application, the degreasing agent is volatile alcohol. Since the degreasing agent flows from a high place to a low place under the influence of gravity, the receiving cavity 421 located at the lowest place does not contain the degreasing agent.

[0043] The degreasing agent flows to the sponge ring 44 through the transmission hole 422. When the blank moves toward the drawing trolley 22, the sponge ring 44 is stretched open and tightly attached to the blank. After the scraper frame 41 scrapes the blank, the sponge ring 44 further absorbs the oil stains remaining on the blank. At the same time, the degreasing agent dissolves the oil stains on the blank and is absorbed by the sponge. When the blank moves away from the drawing trolley 22, the sponge ring 44 also shrinks along with the scraper 42 to be tightly against the sleeve portion 91 of the blank, so as to absorb the oil stains remaining on the blank after the scraper 42 clears it, thereby effectively improving the oil removal rate.

[0044] Reference Figure 6The inner wall of the scraper 42 is fixedly connected with a first fixed cylinder 51 at the transmission hole 422, and the outer wall of the first fixed cylinder 51 away from the transmission hole 422 is fixedly connected with a second fixed cylinder 52, and a valve plate 53 is slidably connected in the second fixed cylinder 52, and the diameter of the cross-section of the valve plate 53 is larger than the inner cylinder diameter of the first fixed cylinder 51 and smaller than the inner cylinder diameter of the second fixed cylinder 52. The scraper 42 is provided with a control component 6 for controlling the movement of the valve plate 53, and the control component 6 includes a first connecting rod 61 that passes through and is hinged on the side wall of the scraper 42 away from the sponge ring 44, a roller 62 that is rotatably connected to the end of the first connecting rod 61 away from the valve plate 53, and a roller 62 that is rotatably connected to the scraper 42. The first connecting rod 61 and the second connecting rod 63 are hinged on the side of the valve plate 53 away from the transmission hole 422, and the ends of the first connecting rod 61 and the second connecting rod 63 are hinged to the rotating disk. The distance from the intersection axis of the first connecting rod 61 and the rotating disk to the blank is smaller than the distance from the second connecting rod 63 to the blank. A second elastic member 64 for moving the first connecting rod 61 closer to the blank is arranged between the first connecting rod 61 and the scraper 42. The second elastic member 64 is a tension spring. A rubber sheet is fixed to the gap between the first connecting rod 61 and the scraper 42, so that the first connecting rod 61 can rotate relatively smoothly and there is good sealing between the first connecting rod 61 and the scraper 42.

[0045] When the feeding clamp 24 moves the blank toward the direction close to the drawing trolley 22, the blank pushes the roller 62 to rotate the first connecting rod 61. At this time, the turntable rotates and drives the second connecting rod 63 to move, so that the second connecting rod 63 pulls the valve plate 53, and then the degreasing agent in the accommodating cavity 421 flows smoothly to the sponge ring 44; the above state continues until the blank is separated from and abuts against the roller 62. At this time, the rollers 62 are acted upon by the second elastic member 64 and approach each other, and the first connecting rod 61 rotates, causing the turntable to rotate as well. The turntable pushes the second connecting rod 63 again. At this time, the second connecting rod 63 pushes the valve plate 53 to move toward the sponge ring 44, that is, the degreasing agent in the accommodating cavity 421 is blocked by the valve plate 53 and cannot flow to the sponge ring 44. The structure is relatively simple, the stability is high, the cost is low, and no additional energy control is required. In other feasible implementations, a white paper strip or a test paper may be glued around the peripheral wall of the roller, that is, when there is oil stain on the surface of the blank, the oil stain will be more clearly visible on the white paper strip and the test paper will change color.

[0046] Reference Figure 6 A support rod 84 is fixedly connected to the side of the scraper 42 close to the sponge ring 44, and a baffle 81 is fixedly connected to the end of the support rod 84 away from the scraper 42. A push-pull rod 82 is fixedly connected to the side of the valve plate 53 close to the sponge ring 44, and an extrusion net 83 is fixedly connected to the end of the push-pull rod 82 away from the valve plate 53. The baffle 81 and the extrusion net 83 are arranged on both sides of the sponge ring 44.

[0047] When the first connecting rod 61 moves and causes the valve plate 53 to move, the moving valve plate 53 also drives the push-pull rod 82 to move, and then causes the extrusion net 83 to move accordingly. When the roller 62 does not abut against the blank, the valve plate 53 moves in the direction close to the sponge ring 44, and the extrusion net 83 also moves in the direction close to the sponge ring 44. At the same time, due to the obstruction of the baffle 81, the sponge ring 44 is squeezed by the extrusion plate. At this time, the mixture of degreasing agent and oil stains in the sponge ring 44 is squeezed out of the sponge ring 44, and the valve plate 53 is closed, and the degreasing agent in the scraper 42 cannot flow out; when the blank opens the roller 62, the valve plate 53 moves in the direction away from the sponge ring 44, and the extrusion net 83 also moves in the direction away from the sponge ring 44, that is, the degreasing agent in the scraper 42 flows smoothly into the sponge ring 44, and the sponge ring 44 is not squeezed, so that the sponge ring 44 continues to receive the degreasing agent.

[0048] Reference Figure 4 and Figure 6 The scraper frame 41 is slidably connected to the bracket 211, and a third elastic member 212 connected to the scraper frame 41 is provided on the bracket 211. The third elastic member 212 is also a tension spring. The third elastic member 212 is always in a stretched state, and the friction force between the scraper 42 and the blank is always smaller than the tension exerted by the third elastic member 212 on the scraper frame 41.

[0049] When the blank enters the scraping frame 41, the pulling force of the third elastic member 212 is greater than the friction between the blank and the scraping frame 41, so that the scraping frame 41 is fixed by the third elastic member 212 and cannot move, while the blank continues to move. At this time, the scraping frame 41 and the blank are in a relative displacement state, that is, the scraping frame 41 scrapes off the cold forging on the surface of the blank; when the feeding clamp 24 continues to push the blank to move until the feeding clamp 24 and the scraping frame 41 are against each other, the thrust of the feeding clamp 24 is much greater than the pulling force of the third elastic member 212, so that The scraper frame 41 is pushed by the feeding clamp 24. At this time, the scraper frame 41 and the blank are in a relatively static state. After the blank is drawn and formed, the feeding clamp 24 pulls the blank to move away from the drawing trolley 22. At this time, the scraper frame 41 is pulled by the third elastic member 212 and moves synchronously until the scraper frame 41 moves to the initial position. The scraper frame 41 is stationary, thereby increasing the moving stroke of the blank during the entire process, so that the degreaser adhered to the blank can be fully volatilized to avoid subsequent interference with the spraying of the drawing oil.

[0050] Reference Figure 4 and Figure 5An elastic rope 213 is tied to the bracket 211, and the elastic rope 213 is connected to the roller 62. When the scraper 42 moves to a position close to the die base 23, the elastic rope 213 pulls up the roller 62; when the scraper 42 moves toward the direction close to the die base 23, the tension of the elastic rope 213 continues to increase until the scraper 42 moves to a position close to the die base 23, and the elastic rope 213 pulls up the roller 62 to avoid the position of the roller 62 from encroaching on the position required for drawing part of the blank, thereby avoiding the roller 62 from colliding with the die base 23. In this process, the elastic rope 213 can also be manually pulled up or the roller 62 can be directly turned to change the position of the roller 62.

[0051] The implementation principle of an intermediate shaft sleeve drawing-cold heading integrated forming device in an embodiment of the present application is as follows: after the blank is cold headed by the first cold heading mechanism 1, the first automatic clamp transports the blank to the feeding clamp 24, and then the feeding clamp 24 clamps the hinged portion 92 of the blank, and then the feeding clamp 24 moves toward the die base 23. At this time, the blank passes through the scraper frame 41, so that the scraper frame 41 scrapes off the cold heading oil remaining on the blank, and the remaining small amount of cold heading oil is absorbed by the sponge ring 44. The blank pushes the roller 62 to move the valve plate 53 away from the sponge ring 44, so that the degreasing agent in the accommodating cavity 421 flows smoothly to the sponge ring 44, and the oil spray pipe 25 sprays drawing oil on the scraped portion of the blank; after drawing is completed, the drawing trolley 22 releases the blank, and the feeding clamp 24 pulls the blank away from the drawing trolley 22. At this time, since the blank has been formed with a sleeve portion 91 of reduced size, the scraper frame 41 cannot scrape off the drawing oil on the sleeve portion 91. The scraper 42 approaches the blank through the action of the first elastic member 43, so that the scraper 42 and the sponge ring 44 are tightly attached to the blank, so that the drawing oil on the blank is scraped off by the scraper 42, that is, the scraper frame 41 removes the cold heading oil on the blank before drawing, and the scraper 42 removes the drawing oil after drawing. The oil removal is more timely and the removal effect is better. No additional manual oil removal is required, and the entire oil removal process does not take up extra time, which effectively reduces the cost of the oil removal operation. After the drawing oil is removed, the second automatic clamp clamps the blank and continues to move it to the second cold heading mechanism 3 for cold heading operation until the finished product is finally cold headed. The entire sleeve processing technology is one-piece molding and does not require welding.

[0052] Embodiment 2

[0053] The present application embodiment is a drawing-cold heading integrated forming process of an intermediate shaft sleeve, referring to Figure 1 and Figure 5 The intermediate shaft sleeve drawing-cold heading integrated forming process includes the following steps: S1, preliminary cold heading of the blank, the blank undergoes cold heading operation by the first cold heading mechanism 1, so that one end of the blank is formed with a U-shaped hinge portion 92, and the other end is formed with a clamping portion that can pass through the die base 23 and is convenient for the drawing trolley 22 to clamp;

[0054] S2, feeding and removing cold heading oil. The first automatic clamp feeds the blank after cold heading in S1 to the feeding clamp 24, and is clamped by the feeding clamp 24. The feeding clamp 24 clamps the blank and moves it toward the direction close to the die base 23. At this time, the blank passes through the scraper frame 41, and the scraper frame 41 does not move due to the action of the third elastic member 212. The scraper frame 41 first scrapes off most of the cold heading oil remaining on the blank, and the sponge ring 44 then removes the remaining small amount of cold heading oil on the blank. At the same time, the roller 62 applies the cold heading agent to the part of the blank that has been cleared, until the feeding clamp 24 moves to abut against the scraper frame 41 and pushes the scraper frame 41 to move synchronously.

[0055] S3, drawing and forming, the feeding clamp 24 pushes the blank through the die base 23, and the drawing trolley 22 clamps and draws the blank, so that the blank is formed into a sleeve portion 91;

[0056] S4, drawing and withdrawing the material, the drawing trolley 22 releases the blank, the feeding clamp 24 clamps the hinged portion 92 and moves away from the die base 23, until the scraper frame 41 returns to the initial position, the scraper frame 41 is stationary, and the blank continues to move. At this time, the scraper 42 scrapes off most of the cold heading oil on the blank, and the sponge ring 44 removes a small amount of cold heading oil remaining on the blank, until the blank is completely separated from the scraper 42;

[0057] S5, cold forging to form the finished product. After the drawing operation is completed, the second automatic clamp clamps the blank in S4 to the second cold forging mechanism 3 for cold forging, so that the end of the sleeve part 91 is cold forged with a groove, and the interior of the sleeve part 91 is cold forged with a spline tooth part 93, and then other details of the blank are further cold forged until it is formed into the final shaft sleeve product.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intermediate shaft sleeve drawing-cold heading integrated forming device, comprising a first cold heading mechanism (1), a drawing mechanism (2) and a second cold heading mechanism (3), wherein the drawing mechanism (2) comprises a bed (21), a drawing trolley (22) movably arranged on the bed (21), a die base (23) fixedly connected to the bed (21) and a feeding clamp (24) movably arranged on the bed (21), the feeding clamp (24) and the drawing trolley (22) are arranged on both sides of the die base (23), and the bed (21) is provided with an oil injection pipe (25) between the feeding clamp (24) and the die base (23). Features: The drawing mechanism (2) is located between the first cold heading mechanism (1) and the second cold heading mechanism (3); a bracket (211) is provided on the bed (21) at the side of the oil injection pipe (25) away from the die base (23); a scraper frame (41) is provided on the bracket (211); the inner wall of the scraper frame (41) is in contact with the outer wall of the hinged portion (92); a plurality of scrapers (42) are hingedly connected to the side of the scraper frame (41) away from the feeding clamp (24); when all the scrapers (42) are folded together, the scrapers (42) are surrounded into a trumpet shape, and the trumpet-shaped small mouth of the scraper (42) is plugged and matched with the sleeve portion (91); a first elastic member (43) is also provided between the scraper (42) and the scraper frame (41); when the scraper (42) is in contact with the sleeve portion (91), the first elastic member (43) is in a stretched state; A sponge ring (44) is commonly provided at the free end of all the scrapers (42) and on one side close to the scraper frame (41), and the inner diameter of the sponge ring (44) in a free state is smaller than the outer diameter of the sleeve portion (91); a receiving cavity (421) for receiving a degreasing agent is provided in the scraper (42); and a transmission hole (422) communicating with the receiving cavity (421) is provided at the joint between the scraper (42) and the sponge ring (44); The inner wall of the scraper (42) is fixedly connected to a first fixed cylinder (51) at the transmission hole (422), and the outer wall of the first fixed cylinder (51) away from the transmission hole (422) is fixedly connected to a second fixed cylinder (52), and a valve plate (53) is slidably connected inside the second fixed cylinder (52), and the diameter of the cross section of the valve plate (53) is larger than the inner cylinder diameter of the first fixed cylinder (51) and smaller than the inner cylinder diameter of the second fixed cylinder (52), and a control component (6) for controlling the movement of the valve plate (53) is arranged on the scraper (42); The control assembly (6) comprises a first connecting rod (61) penetrating and hinged on the side wall of the scraper (42) away from the sponge ring (44), a roller (62) rotatably arranged at the end of the first connecting rod (61) away from the valve plate (53), a turntable rotatably arranged in the scraper (42) and a second connecting rod (63) hinged at the side of the valve plate (53) away from the transmission hole (422), and the ends of the first connecting rod (61) and the second connecting rod (63) are both hinged to the turntable, the distance from the intersection axis of the hinge between the first connecting rod (61) and the turntable to the blank is smaller than the distance from the second connecting rod (63) to the blank, and a second elastic member (64) for moving the first connecting rod (61) closer to the blank is arranged between the first connecting rod (61) and the scraper (42); The scraper frame (41) is slidably connected to the bracket (211); a third elastic member (212) connected to the scraper frame (41) is provided on the bracket (211); the third elastic member (212) is always in a stretched state, and the friction force between the scraper (42) and the blank is always smaller than the pulling force exerted by the third elastic member (212) on the scraper frame (41).

2. The intermediate shaft sleeve drawing-cold heading integrated forming device according to claim 1, Features: An elastic bag (71) containing a cold heading oil detection agent is arranged on one side of the scraper (42) away from the scraper frame (41); the roller (62) blocks the opening of the elastic bag (71); a buffer cloth (72) is also arranged at the opening of the elastic bag (71), and the buffer cloth (72) is in contact with the roller (62).

3. The intermediate shaft sleeve drawing-cold heading integrated forming device according to claim 2, Features: A baffle (81) is provided on the scraper (42); a push-pull rod (82) is fixedly connected to one side of the valve plate (53) close to the sponge ring (44); an extrusion net (83) is fixedly connected to one end of the push-pull rod (82) away from the valve plate (53); and the baffle (81) and the extrusion net (83) are arranged on both sides of the sponge ring (44).

4. The intermediate shaft sleeve drawing-cold heading integrated forming device according to claim 1, Features: An elastic rope (213) is tied to the bracket (211), the elastic rope (213) is connected to the roller (62), and when the scraper (42) moves to a position close to the mold base (23), the elastic rope (213) pulls up the roller (62).

5. A process for integrally forming a middle shaft sleeve by drawing and cold heading, based on the device for integrally forming a middle shaft sleeve by drawing and cold heading according to any one of claims 1 to 4, It is characterized in that The steps include: S1, preliminary cold heading of the blank, the blank undergoes cold heading operation by the first cold heading mechanism (1), so that one end of the blank is formed with a U-shaped hinge portion (92), and the other end is formed with a clamping portion that can pass through the die base (23) and is convenient for clamping by the drawing trolley (22); S2, feeding and removing cold heading oil, feeding the blank after cold heading in S1 to the feeding clamp (24), and clamped by the feeding clamp (24), the feeding clamp (24) clamps the blank and moves it in the direction close to the die base (23), at this time, the blank passes through the scraper frame (41), and the scraper frame (41) does not move due to the action of the third elastic member (212), the scraper frame (41) first scrapes off most of the cold heading oil remaining on the blank, and the sponge ring (44) then removes the remaining small amount of cold heading oil on the blank, and at the same time, the roller (62) applies cold heading agent to the part of the blank that has been cleared, until the feeding clamp (24) moves to abut against the scraper frame (41) and pushes the scraper frame (41) to move synchronously; S3, drawing and forming, the feeding clamp (24) pushes the blank through the die base (23), and the drawing trolley (22) clamps and draws the blank, so that the blank is formed into a sleeve portion (91); S4, drawing and withdrawing the material, the drawing trolley (22) releases the blank, the feeding clamp (24) clamps the hinged portion (92) and moves in the direction away from the die base (23), until the scraper frame (41) returns to the initial position, the scraper frame (41) stops and the blank continues to move, at this time the scraper (42) scrapes off most of the cold heading oil on the blank, and the sponge ring (44) removes a small amount of cold heading oil remaining on the blank, until the blank is completely separated from the scraper (42); S5, cold forging to form a finished product. After the drawing operation is completed, the blank in S4 is clamped to the second cold forging mechanism (3) for cold forging, so that the spline tooth portion (93) is cold forged inside the sleeve portion of the blank, and then other details of the blank are further cold forged until it is formed into a final product.

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