Auxiliary device for grinding junction surface of heavy headstock

Abstract

The invention discloses an auxiliary device for grinding a junction surface of a heavy headstock, which is characterized in that the device comprises a positioning mechanism and a rotary driving mechanism, the positioning mechanism comprises a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are connected through a pair of bolts; the first positioning plate is located in a guide rail groove formed in a machine tool body, the second positioning plate is pressed at an opening of the guide rail groove, a V-shaped groove is formed in the inner side face of the second positioning plate and matched with an E-shaped guide rail arranged on the machine tool body, meanwhile, a first rotating shaft is arranged on the outer side face of the second positioning plate, and a second rotating shaft is arranged on the first rotating shaft. The rotating driving mechanism comprises a first driving rod, a connecting hole matched with the first rotating shaft is formed in the first driving rod, one end of the first driving rod is rotationally connected with one end of a second driving rod, a positioning bolt is arranged at the other end of the second driving rod, and the positioning bolt is matched with a mounting hole formed in the edge of the headstock.

Description

Technical Field

[0001] The present invention relates to the field of production and assembly of machine tools, and particularly to an auxiliary device for grinding the joint surface of a heavy headstock. Background Art

[0002] The headstock is an extremely important component in ordinary lathes and CNC lathes, equivalent to the human brain. Its main task is to transmit the torque of the main motor to the spindle after speed change through the speed change mechanism, so as to obtain different speeds in two rotation directions of forward and reverse. In order to ensure the accuracy and stability of the machine tool accuracy, there are relatively strict requirements for the contact rate and contact points between the bottom surface of the headstock and the upper plane of the bed. Only by ensuring the close contact of the above two surfaces can the machine tool not vibrate during operation. In order to meet the above requirements, it is necessary to grind the contact surface between the headstock and the machine tool bed when installing the headstock to ensure their close contact.

[0003] The traditional method is as follows: First, evenly apply a dye on the bed body, then wind a sling around both ends of the total length of the headstock spindle. The hook hangs the front and rear slings together, and the other end of the hook is hung inside the crane hook. The headstock is lifted by the crane and lowered onto the bed body. Then, four operators simultaneously push the headstock by hand to move it left and right on the bed body. After several reciprocations, the headstock is lifted again. Since the bottom surface of the headstock is flat macroscopically, but actually has unevenness microscopically, after several reciprocating grindings, traces (i.e., bright spots) will appear where the highest points pass. Finally, the operator uses a professional grinding scraper to scrape the high points to ensure the effective contact rate of the two contact surfaces. However, the above traditional operation method will cause intermittent jamming phenomena during its movement due to uneven force application by the four operators, unable to reflect the actual contact situation of the contact surface, and at the same time increasing the assembly working hours of the operator.

[0004] Therefore, there is a need for a method or device that can solve the above problems now. Summary of the Invention

[0005] The present invention is to solve the above-mentioned deficiencies of the prior art, and proposes an auxiliary device with a simple structure, ingenious design, reasonable layout, which can efficiently and accurately realize the grinding operation of the joint surface of a heavy headstock on the premise of saving manpower.

[0006] The technical solution of the present invention is: An auxiliary device for grinding the joint surface of a heavy headstock, characterized in that: the device includes a positioning mechanism and a rotary drive mechanism. The positioning mechanism includes a first positioning plate 1 and a second positioning plate 2, which are connected by a pair of bolts 3. The first positioning plate 1 is located in a guide rail groove 5 opened on a machine tool bed body 4, and the second positioning plate 2 presses against the opening of the guide rail groove 5. A V-shaped groove 6 is opened on the inner side surface of the second positioning plate 2, and the V-shaped groove 6 matches a dovetail guide rail 7 provided on the machine tool bed body 4. At the same time, a first rotating shaft 8 is provided on the outer side surface of the second positioning plate 2. The rotation driving mechanism includes a first driving rod 9. A connection hole 10 matching the first rotating shaft 8 is opened on the first driving rod 9. One end of the first driving rod 9 is rotatably connected to one end of a second driving rod 11. A positioning bolt 12 is provided at the other end of the second driving rod 11, and the positioning bolt 12 matches an installation hole 14 provided at the edge of a headstock 13.

[0007] A spacer plate 15 is provided between the first driving rod 9 and the second driving rod 11, and the first driving rod 9, the spacer plate 15 and the second driving rod 11 are connected by a second rotating shaft 16. Limiting nuts 17 are respectively connected to both ends of the second rotating shaft 16.

[0008] Compared with the prior art, the present invention has the following advantages: The auxiliary device for grinding the joint surface of a heavy-duty headstock with this structural form has a simple structure, ingenious design and reasonable layout. It aims at the problems of uneven contact rate and low efficiency when an operator grinds the joint surface of a headstock body, and designs a special structure. It consists of a positioning mechanism and a rotation driving mechanism. An operator only needs to fix and lock the positioning mechanism according to the relative positions of the headstock and the bed body, and only one person needs to push and pull one end of the rotation driving mechanism at a uniform speed, then the headstock body can be driven to move reciprocally on the bed surface. On the one hand, it can greatly save labor (from multiple people originally to one person), and on the other hand, it can also avoid the situation that the grinding marks are inaccurate due to uneven force on the headstock caused by multiple people applying force at the same time, and can effectively improve the grinding effect. And the manufacturing process of this device is simple and the manufacturing cost is low. Therefore, it can be said that it has multiple advantages, is particularly suitable for popularization and application in this field, and has a very broad market prospect. Description of the Drawings

[0009] Figure 1 is the front view of an embodiment of the present invention.

[0010] Figure 2 is the top view of an embodiment of the present invention.

[0011] Figure 3 is the structural schematic diagram of the positioning mechanism part in an embodiment of the present invention.

[0012] Figure 4It is a schematic structural diagram of the rotary drive mechanism part in the embodiment of the present invention.

[0013] Figure 5 It is a cross-sectional view of the embodiment of the present invention. Specific implementation manners

[0014] The following will describe the specific implementation manners of the present invention in conjunction with the drawings. As Figures 1 to 5 shown: An auxiliary device for grinding the joint surface of a heavy headstock includes two parts, a positioning mechanism and a rotary drive mechanism. The positioning mechanism includes a first positioning plate 1 and a second positioning plate 2, which are connected by a pair of bolts 3. The first positioning plate 1 is located in a guide rail groove 5 opened on a machine tool bed 4, and the second positioning plate 2 presses on the opening of the guide rail groove 5. A V-shaped groove 6 is opened on the inner side surface of the second positioning plate 2, and the V-shaped groove 6 matches a mountain-shaped guide rail 7 provided on the machine tool bed 4. At the same time, a first rotating shaft 8 is provided on the outer side surface of the second positioning plate 2. The rotary drive mechanism includes a first drive rod 9. A connection hole 10 matching the first rotating shaft 8 is opened on the first drive rod 9. One end of the first drive rod 9 is rotatably connected to one end of a second drive rod 11. A positioning bolt 12 is provided at the other end of the second drive rod 11, and the positioning bolt 12 matches an installation hole 14 provided at the edge of the headstock 13.

[0015] A spacer 15 is provided between the first drive rod 9 and the second drive rod 11, and the first drive rod 9, the spacer 15 and the second drive rod 11 are connected by a second rotating shaft 16. Limiting nuts 17 are respectively connected to both ends of the second rotating shaft 16.

[0016] The working process of the auxiliary device for grinding the joint surface of the heavy headstock in the embodiment of the present invention is as follows: When it is necessary to grind between the bottom surface of the headstock 13 and the support surface of the machine tool bed 4, first use a lifting tool such as a crane to lift the headstock 13 onto the machine tool bed 4, and then determine the relative position of the positioning mechanism on the machine tool bed 4 according to the stroke of the headstock 13. After determining the position, fix the positioning mechanism on the machine tool bed 4. During specific operation, tighten the two bolts 3, and the bolts 3 will reduce the distance between the first positioning plate 1 and the second positioning plate 2, thereby realizing the clamping of the edges of the first positioning plate 1 and the second positioning plate 2 to the guide rail groove 5, so as to fix the positioning mechanism. Then sleeved the first drive rod 9 on the first rotating shaft 8 through the connection hole 10 thereon, and adjust the position of the free end of the second drive rod 11 to make it in a corresponding position with a certain installation hole 14 on the headstock 13. Insert the positioning bolt 12 into the through hole at the free end of the second drive rod 11, that is, connect the second drive rod 11 and the headstock 13 through the positioning bolt 12 (the positioning bolt 12 can rotate freely in the installation hole 14), and the preparation work is completed. The operator holds the end of the first driving rod 9 and pulls the first driving rod 9 to swing around the first rotating shaft 8. During the swinging process of the first driving rod 9, the second driving rod 11 will be driven to move through the second rotating shaft 16. The second driving rod 11 applies a thrust or a pull to the headstock box 13 through the positioning bolt 12 to drive the headstock box 13 to reciprocate relative to the machine tool bed 4. There is a relative movement between the bottom end surface of the headstock box 13 and the supporting surface of the machine tool bed 4. After reciprocating for many times, the headstock box 13 is lifted up by a hoist, and the dye pre-coated on the supporting surface is observed. The bright spot is the uneven high point. The operator scrapes the high point with a grinding scraper and repeats the above operation until the degree of fit between the bottom end surface of the headstock box 13 and the supporting surface of the machine tool meets the requirements.

[0017] After the operation is completed, the rotary drive mechanism is removed from the positioning mechanism, and the bolts 3 are unscrewed from the threaded holes on the first positioning plate 1 and the second positioning plate 2, and the first positioning plate 1 is removed from the guide rail groove 5; When using this auxiliary device for grinding operations, due to the presence of the rotating drive mechanism, only one person is needed to drive the heavy headboard box 13, and can drive in two directions. Compared with the traditional manual push-pull method, it can greatly save labor; at the same time, the force state of the headboard box 13 is stable during the movement, which can ensure the grinding effect.

Claims

1. An auxiliary device for grinding the joint surface of a heavy-duty headboard, characterized in that: The device comprises two parts: a positioning mechanism and a rotation drive mechanism. The positioning mechanism comprises a first positioning plate (1) and a second positioning plate (2), which are connected by a pair of bolts (3); the first positioning plate (1) is located in a guide rail groove (5) provided on a machine tool bed (4); the second positioning plate (2) is pressed against an opening of the guide rail groove (5); a V-shaped groove (6) is provided on an inner side surface of the second positioning plate (2); the V-shaped groove (6) matches a mountain-shaped guide rail (7) provided on the machine tool bed (4); and a first rotating shaft (8) is provided on an outer side surface of the second positioning plate (2). The rotary drive mechanism comprises a first drive rod (9), the first drive rod (9) being provided with a connection hole (10) matching the first rotating shaft (8), one end of the first drive rod (9) being rotatably connected to one end of a second drive rod (11), the other end of the second drive rod (11) being provided with a positioning bolt (12), the positioning bolt (12) matching with a mounting hole (14) provided at the edge of a bedside box (13).

2. The auxiliary device for grinding the joint surface of a heavy-duty headboard according to claim 1, characterized in that: A pad (15) is provided between the first driving rod (9) and the second driving rod (11), and the first driving rod (9), the pad (15) and the second driving rod (11) are connected via a second rotating shaft (16), and both ends of the second rotating shaft (16) are respectively connected to limit nuts (17).

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